Oh, Manatee, I think I’d like to be sitting nearby when you eventually take the children to see “Life of Brian”. "Welease Woger"and so on. 
From the suggestions so far, I’d say Ryan is about the best - I mean, anything but “Randy”. “Rhys” springs to mind, but |I don’t think you’d want that.
FWIW - I have two brothers, one of whom has the same initial as I have, while the other one does not - I’d never noticed that being any kind of an issue for brother Calum.
Remember, you’re not just naming a child who’ll be seen & dealt with in the company of his two R-brothers. You’re naming a person for life. Yes, adults can change their names, but it’s pretty rare unless they’ve been given something truly horrible, and in that case the damage’s long since done by the time they can change it.
My advice is a non-R name which is good as a kid, yet also works as an adult. This is more of an issue with female names. I love a 5-year old named “Tiffany”, but I have a hard time seeing a 45-year old corporate VP named Tiffany, or a 75-year old senior named Tiffany.
My advice would be to avoid the current “hot” names, whatever they are. When I was in grade school, we had 3 Steves and 2 Roberts. They didn’t like being one of a crowd. Right now there are hordes of 8-year old Jordans, most of whom wish they’d been named something different from all the other Jordans.
If this kid not having a “letter buddy” is a major concern, pick a first name which shares an initial with Mom, Dad, or a favorite relative. Or if one of these R names is OK, but not truly to your taste, pick a first name that suits you and give the kid an R name for a middle name.
Anecdote with little relavence to this thread, but who cares.
On Easter I spent the day with my brother, his wife and an assortment of in-laws. I felt kind of left out at one point, being one of only three who did not have the same first initial as almost everyone else. Later we watched Pooh’s ABCs (or some such program, I don’t know its exact title) and the characters were identifying letter buddies, Pooh and Piglet, Rabbit and Roo, but no buddies for Eeyore or Tigger. My little niece was reminded that she has a letter buddy in Aunt Eureka. Even though my niece was named for someone I am not related to, I was oddly flattered that we share an initial
See my second link above. Probably a U.S. phenomenon.
If you really don’t want to give the kid a complex, make sure the name has two syllables, and that it has an R as the second to last letter (two other characteristics your kids’ names share).
Seriously, “letter buddies”? Of all the things for a kid/parent to get worked up over. Any kid that would feel left out because of the first letter of his name needs therapy. Or a spanking.
You can’t go wrong with Beck. It may or may not age well, however, but right now it’s very hip. 
I’m very partial to names that can go male or female, but you might not agree. I like the names Jamie and Kelly a lot. Stefan is a great name (pronounced Stef-n, not Steven). For some reason, Nick comes to mind as a possibility.
I would go with anything but an “R” name. I don’t think he’ll feel left out, I think he’ll feel extra special.
Go ahead, mock me about the Beck thing. But all over America, millions of little Britneys and Kobes are being born. It’s a cultural phenomenon!
my mum had 4 siblings, 3 "m"s, 1 “k.” just checked with mum, k didn’t feel left out.
k was the favourite sibling of all of them. sort of the “beth” of the family.
checking “an enlighten guide to naming you child” the sibling name chapter…
it suggests:
ideally, the names you choose for later children should “go with” the name you picked for your first child: they chould be harmonious in rhythym and style. at the same time names of later children should be different enough from the first child’s name to avoid confusion. also it does mention “don’t fall into the same initial trap.” you may get locked into a letter that has limited resourses.
since you went with richard and robert, another common english name would fit right in them.
reginald?
A third “R” would be too … too.
BTW, do Richard and Robert go by nicknames? Does either of them go by a nickname (Dick [hee, she said “Dick”] or Bob)? That would dilute the "R"ness a bit.
You’re welcome to use my favorite boy’s name: Timothy.
Dammit – hit “submit” instead of “preview.”
The second sentence in the second paragraph s/b:
Does either of them go by a nickname…that doesn’t begin with “R”?
You need a spanking, continuity eror. 
I grew up in a family where I was the odd one out. My mom and brother are DSN, my dad is JRN and I was supposed to be JRN (Jacqueline Renee). I ended up with NMN. I wasn’t “left out” but I still wish I’d gotten better initials (NMN sucks) and matched my dad’s.
However, I have distant relatives that are Debbie, Derrick (mom and dad) Dwight, Dwayne, Dawn, Denise and Darren. This is silly, and should be avoided.
I haven’t read the entire post, I just scooted to the end, but I would suggest:
WILLIAM
It’s regal, it’s refined, it’s historic, and…
it’s my name!
I’m going to discuss kids being different:
Our daughter is our bio child. She has a first name, middle name, last name. She has brown hair and blue eyes.
Our son is our adopted child. He has a first name, two middle names - one his birth mother’s family name, and a last name. He is Korean, which gives him (fairly obviously) jet black hair, golden skin, almost black Asian eyes.
We live in a diverse suburb of the Twin Cities, which means only 80% of our neighbors are white.
Our daughter is the one who complains about being different.
Name him what you want. If he has the temperment, he will be upset because his name has more syllables or less letters or he was born in the Spring and everyone else was born in the Fall. If he has the temperment, he could be blue and not care.
::standing ovation::
Another anti-R voter here, for the same reasons everyone else has said.
Ever considered that the kid may feel special for not having an “R” name?
As boy names go, my very favorite is David. Nice, solid, masculine, and everyone knows a guy named Dave who’s a “great guy.”
However you’re welcome to “steal” my future son’s names, if you want:
Vincent and Quinn.
Well, I’m sorta the odd one out among my siblings, name wise. Youngest of four, and while we don’t use any of the same letters, the first three were all named for someone, Grandmother, aunt and uncle specifically, then I happened and they just liked my name. I always found it rather nifty that I got more of an original than the other three, so even though it was breaking the established pattern, I thought it was cool. No trauma whatsoever.
I think it’d be weirder for the kid if you went with Dweezil or Rainbow or some such hippy crap, stay traditional and it’s all good.
You just hit on our two “non-R” frontrunners (William and Edward).
Re: William
You also get some nicknames that come ‘standard’ with this vehicle:
[ul]
[li]Wilbur[/li][li]Will[/li][li]Bill[/li][li]Liam[/li][/ul]
While I love ‘Liam’, I hate ‘Bill’. I’ve known too many fuckups that went by the name ‘Bill’.
‘Liam’ is my personal fave. It’s obscure yet defined, if that makes any sense…
Sorry, I don’t know how to do the multiple quote thing (pulling snippets from multiple posts). So if I could single out a couple of you…
Marley23: that’s exactly the kind of personal experience I was looking for. Thanks for sharing. Celyn and rocking chair and FilmGeek too.
Shirley Ujest: thanks for the suggestions! Thomas is another candidate right now too. And thanks for the well-wishes. Come late August, I’ll try to remember to post a thread about how everything went (of course, the additional 10 point IQ drop may prevent me from remembering).
Twickster: the first two go by Ricky and Bobby, which got me thinking that the “non-R” thing isn’t that big of a deal. Timothy’s out, though, as that’s my name (well, kinda; my birth certificate actually reads “Tim,” but it’s close enough to rule out: “all same initials” bugs me, as does “all rhyming names”–juniors are a close runner-up).
Queen Tonya: as you can probably guess from the stodginess of our names so far, there’s little risk of us picking a 'hippie-esque" name!
Sorry, just wondering what the “beth” of the family means? I’ve always hated my prosaic, boring name (Elizabeth Anne - well, heck, least I got an extra pretentious ‘E’) but still, such a dull, plain vanilla name.
Is a “beth” something like a redheaded stepchild or something??
Beth was the favorite sister in Alcott’s Little Women.