Namechanged to avoid outing myself 
When I was pregnant, we chose (or rather, did not disagree) on the name James for our son. DH is Irish and there was a fair amount of banter around his side of the family calling him Seamus.
Here is the ishoo...
As soon as he was born, I gazed lovingly at my wrinkly little James...
...only to discover that he looked more like a Seamus 
Stupidly, I did not say anything, as we'd been referring to him as James since the 20 week scan and Seamus had been a bit of a family joke.
That was two months ago. I've been calling him James, but he still doesn't look like one.
AIBU to start calling him Seamus? DH is in agreement that the name suits him more than James.
I mean, it's not like he'd notice, right?
runs away