The two meanings I have heard are, mostly commonly, Law Enforcement Officer, and less commonly, Low Earth Orbit.
leo = with-them. It can also mean 'slush, slime'.
Do you mean Leo the star sign? If so, it represents a lion and Leo is the Latin for lion.
Leo or Lev means lion in Russian.
The Lion
Leo is Latin for lion. See the Related Link.Lion
Leo comes from Leon, which means 'lion' in Greek.
It Means Lion
Leo
leo y esribo means: read and write
If you mean, which animals has the latin name, Panthera leo, then it is the Lion.
I haven't heard that term when relating to the US Navy. But in the Royal Navy SDG is a scubadiver
SECNAV is an acronym for Secretary of the Navy