So I have been saying it correct. Tonka!
The way the person who has that name would like you to. I work with two people with this surname and they both pronounce it differently so I have a Pat-ell and a Puh-tell to keep straight.
In my husbands family there are 3 distinctly different pronounciations of his surname and I’ve given up keeping up with all of them, I’ve picked mine and now I have a side 
I’ve never known a Patel, so I voted “something else”.
Does your company not have an IT team? No, I kid, I kid.
Only Patel experience I have is listening to the Vergecast (The Verge’s podcast), which has senior editor Nilay Patel. He pronounces it Puh-TELL.
Out of over 100 votes so far we haven’t had one smartass vote pottle yet???
I would pronounce it “Puh - TAIL”
As an Indian, I have known a fair number of Patels. The “TELL” ending is used more by Westerners than Indians.
Probably like this. Definitely an “a” sound, not a “u” one in the first syllable.
Pa-TELL, where “Pa” I guess sounds like “Puh” in the same way that vowels often get swallowed. You may as well write “P’tel” like the name of a Dragonrider from Pern or something.
How else would you pronounce it? “Pottle”? Whaaa?
OP has to come back and tell the back story to this rather lopsided poll.
What back story? I’m not familiar with Indian names, is all.
I first began to suspect I had it wrong when I heard Professor McGonagall use the Pa-TELL pronunciation.
Again, ignorance fought and all that. :o
Pa-TELL.
It’s usually pronounced Pa-tell in English speaking countries by non-indians but is more correctly pronounced Puh-tell. In India it would be more like Puh-deil although most British Indians, and probably US Indians, wouldn’t go that far.
In India an a in the middle of a word is usually pronounced as a u. T especially at the start of a word is often pronounced as a d.
So if I could vote I’d go for Puh-tell.
IANAGujarati, but another Indian checking in FWIW. If I were to pronounce it, the ending would definitely be closer to ‘tail’ than to ‘tell’. That said, there are people in this thread who know Patels living in the west, and such communities tend to diverge from their roots. It is entirely possible that Patels now prefer a pronunciation that is closer to Puh-tell than the original Puh-tail.