I don't like
Patty, my sister's nickname, but I do like
Trish and
Tricia. My sister, in fact, tried in elementary school to change her nickname to
Trish, but it just didn't take.
Funny how some nicknames just naturally get shortened in adulthood and some don't. My sister has never gone by
Pat. My other sister's name is
Pamela, and she was called Pammy in childhood. They were
Patty and Pammy. As they reached puberty, Pammy just naturally was shortened to
Pam, which is what everyone calls her now, but
Patty stayed
Patty. Both seem natural to me---Patty is a name which is fine for an adult woman, but Pammy isn't--but I'm not sure why!