I have 2 friends who have heavily-J-named families (one includes a dog named Joey). I don't think it's that bad/annoying to have a bunch of names with the same first letter unless 1) the last name also started with that letter or 2) the names sound too similar.
Fake Examples:
Johnny, Jason and Jessica Smith - cute
Laura, Laurel and Leah Larson - please don't
^This^
My ex was part of a J family. Joel, Jim, Jeri, Jeff and John and it didn't seem to bother anyone.
My high school boyfriend was in a family of J's, and I have dozens of J names from my past that are unpleasant.
Then I met this redneck family whose father was John. The kids were John, Jr., Johnna, Johnette, Jon, Jonathon, and Johnella. It made me long for a John Boy!
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