div·er·marv (\ˈdī-vər-märv\)

Derived from:

1: a person that dives
2: a person who stays underwater for long periods by having air supplied from the surface or by carrying a supply of compressed air

marv: a shortened version of Marvin
1: Mariner Teutonic 
2: Lives by the Sea  Celtic 
3: Friend of the Sea  English 
4: Famous Friend  English 
5: Calm Sea (Mamlin, Mervyn) English

an interesting individual with whom you really should be friends