Question

prefix for Rear Admiral

Comments

I've proposed a merge between Morrison-4201 and Morrison-9433.

Answer 1

One of two possible, depending on whether one or two star:

RDML or RADM

See: https://en.wikipedia.org/wiki/United_States_Navy_officer_rank_insignia

Answer 2

Just so you know, I've linked his wikipedia page and added the Notables template

Comments

His son, Jim Morrison, was recently added to WT, but the profile is closed and no sources.

Answer 3

The abbreviation is RADM in most Navies.