‘about not having a shver with same name as you – i think it’s from R’ Yehuda Hachassid. I’ve heard it said – halevai he would have written the Aseres Hadibros!
If your point is, that its a small issue, I know there are some Rabonim who are VERY machmir Not to take a SIL with the same name.
As far as gebrokts on the 8th say ONLY, most pple hold that way.
The ones who don’t, are the exceptions.