Choose the correct pronoun to complete the sentence. vincent caspar, for i am named, is a good neighbor and friend.
who
whom

The correct pronoun to complete the sentence above is Whom. Whom is used instead of “who” as the object of a verb or preposition. 

Whom is only used in written English and in formal spoken English. Who is normally used as the object of a verb or preposition, but immediately after a preposition whom is generally used: the man with whom she lived. It would, however, be more natural to say: the man she lived with.