How popular was the name Elvis before Mr. Presley? Wiki isn’t really clear about it and most of the notable Elvi listed were born after the singer.
According to thisElvis is known in the US since the 1880’s, although it has clearly grown in popularity since the 1950’s.
*"“Elvis” is not Latin and never has been, so the faux-Latin “Elvi” is not justified. And if Elvis was Latin, this would be a 3rd-declension i-stem so the plural would be “Elves” (pronounced as two syllables).
Elvis is the Anglicized version of “Ailbe”, the name of an Irish saint. So you should form the plural according to normal English rules, e.g., “Elvises”."*
*After all the crap I’ve taken over “No problemo”, I deserve a chance to be a pissant too. 
Elvis was the middle name of his father, Vernon Elvis Presley
You can find information about the relative popularity of names for babies at this site:
http://www.babynamewizard.com/voyager#prefix=elvis&sw=both&exact=false
Elvis had a fairly consistent increase in popularity from the 1940s until the 2010s ranging from 40 to 80 per million baby boys. It was more popular in the 1900s than the 1940s so it’s likely Elvis Presley renewed its popularity though not certain as many names go in cycles.
Thanks everyone for the info and the links. I didn’t realize his dad also carried the name.
Jeez, I was just adding a little humor to the thread!
Interesting thing about that link, it appears the name was on the way out until he got famous. Interesting how one man can singlehandly revive a name… but it’s probably happened elsewhere.
Don’t think Judas did much for his name’s popularity…
Yeah, you need to watch out for those Jackmaniiii.
or Herr Hitler, for Adolf.
Note that “Elvis” is part of a group of names: Elvis/Alvis for men, Elva/Alva for women and variants. But with exceptions. E.g., Thomas Alva Edison.
We have relatives with the “A” variants in unrelated branches. All seem to have Southern-ish roots.
Jesus Christ, there’s four of 'em now? This is worse than I thought!
You need to be wary of assuming gender from a given name. We have a leading male politician called Hilary. Hilary Benn - Wikipedia
Then you should beware the heck out of all the iiandyiiiiiiii
Doesn’t even have to be a real person. The name Madison for a girl, almost unknown before 1985, rose after the 1984 movie Splash to be the second most popular girl’s name in the U.S.
http://www.babynamewizard.com/voyager#prefix=adolph&sw=both&exact=false
Apparently, (in the US at least) Adolph was rapidly declining in popularity right up until Herr Hitler got famous. While it continued to decline, the rate at which it dropped slowed considerably, only nearing zero in the late 1960s.
When the TV show Bewitched was being created, they gave the characters from the magical side of the family names that would sound old-fashioned, because they hadn’t been popular in decades.
Samantha had dropped off the graph before 1900, and while it started coming back in the 1950s, there is a notable spike in popularity that coincides with the premiere of Bewitched.
http://www.babynamewizard.com/archives/2010/7/samantha-the-ultimate-new-classic
So why dont we have more Gilligan’s now? Oh wait his first name was Willy.
Endora took off then as well.
And of course Tabitha, which had a giant spike after the character appeared.