Oh god no I hate that name - far too common and sooo outdated it needs to stop being used, who looks at a baby and thinks it looks like a John??!!
Remembered another name I dislike today and it gave me more ideas
Linda
just yuck!
Donna
Louise
Gemma/Jemma (hate)
Louise
Hannah
Hilary
Michelle
Fiona
When Megan is spelt Meghan
Another one that infuriates me is when Ian (a tragic enough name imo) is spelt Iain that extra i has me wanting to pronounce it Ee-ayne or Eye-ayn
Dana
Steven.. Even worse if spelt Stephen (makes me wanna say it as steph-enn)
Alistair
Neil
Keith
Gregg
Barry
Craig
Paul
Also Paula
Xavier
X names in general
Gavin
Stacey
I'll stop