Good rule.A rule we had was not to have double same initials. So 1st and last names could not have same beginning letter. We also wouldn't do weird spellings or weird or trendy names. And DH was adamant that any son of ours get a traditional boy name so as not to get made fun of. (but I do like the unisex and typical last names for girls...both my girls have those both)
My oldest sister named her youngest son after our step father. Still causing a world of confusion when talking about either of them, LOL.