It's fine & I've used that. Given a name (say Jones) then the possessive is with a "'s" suffix (Jones's) but for by convention you can elide the final "s" to av

It's fine & I've used that. Given a name (say Jones) then the possessive is with a "'s" suffix (Jones's) but for by convention you can elide the final "s" to avoid duplication (so: Jones'). I'm happy that can be done with a "z", hence Baez' is fine.