No.common decency is not expecting to be tippy toed around over choices. Whether it be attire or a chosen name
Common decency is the ability to graciously accept a name can be shared. Common decency not to go in a huff, refuse to speak to or witter on about crushed dreams
You see common decency is the ability to tolerate others and not have an egocentric world view that only your preferences matter .. One can,and plenty do,share baby names with other parents.its not catastrophic. its life
Well EXACTLY @lipstickhandbagcoffee
Remember on FRIENDS, when Monica told Rachel what name she would give her first born, and Rachel loved it, and wanted to use it. Monica said 'that's OK sweetie, you can use it.' She also acknowledged she probably should not have told her, but was more than happy for her to use it. (In addition, there was also nothing to stop her calling her daughter that name too.)
That's what a friend is. Not someone who sulks and pouts and refuses to talk to anyone ever again, and accuses someone of 'crushing their dreams' and 'making them sad for life,' because they used the name for their baby that they wanted.
Absolutely pathetic. I am so glad I don't have many of the people on this thread in my life in any way, shape or form. Couldn't stand the drama and the histrionics. They would be ghosted pretty sharpish if they behaved like that around me. (Yes yes say you wouldn't want someone like meeeee in your life either la la la..)
IDGAF
So....
I still maintain that the OP's relative has only herself to blame (if someone else wants to use it,) for blabbing the name.
A name does not belong to anyone.
Anyone kicking off and threatening to disown someone for 'stealing' the name they were going to have for their baby is childish, petulant, and a little bit pathetic.
The person who DID use said name should just use it no matter how anyone kicks off, as they are better off without the ranty drama queen who threatened to disown them for having the temerity to use the name THEY had chose for THEIR baby.
@spidey66
It's his cousin,so not a sibling. They're at different ends of the country so won't see each other that often. The other child isn't conceived. I'd go for it.
I've got loads of cousins and quite a few have the same name, some with the same surname. It's never been an issue.
Exactly this! As I said earlier, I have got extended family/relatives with the same first name, (and a few with the same second name AND first name!) No-one has ever sulked or pouted or thrown their toys out of the pram if someone has used THEIR child's name.
I am willing to bet that every single one of the naysayers bashing people for using a name 'someone else thought of first' has the same thing in THEIR family(s) Some people with the same name.
I am also willing to bet that not a single one of them would kick off in real life, and disown the person in question, and it's all bravado for this forum. In real life, no way would they disown a cousin (or another relative,) for using a name they were going to use for their baby. They would probably be annoyed, but would concede that if they were dumb enough to tell people the name, that it's their own fault someone else 'stole' it.' 
All pointless now as the OP has said she isn't using it I still think she probably is, but is sick of vipers calling her the devil incarnate for using a name for her baby that a relative told her SHE was going to use....