Help! Girl name.

Nicole • Hi I'm Stephanie. 24, mom of 3 girls (4,3,1) and pregnant with our 4th.
A close friend of ours passed away May 2015 and we are thinking of naming our baby girl after him. Her name would be Posey Olivia Pierre and her nickname would just be "P" What do you guys think? Of course I love the meaning behind the name, posey was his last name, but I can't get over the initials being POP or PP. Am I being silly? Should I think of another name?