>What's Mavort-?
A perfectly respectable god-name in Latin, used as an alternative for Mars,
and as the basis for the adjective Mavortius. It is suggested that Mavors
< *magh (Greek mache = battle) + *vert/vort ("turn"), so meaning "he who
turns the battle". The name Mars could be merely a contraction from
Mavors.
You'll find examples in Vergil's Aeneid at 6:872, 8:630 and about 5 other
places, so it's thoroughly classical.
Peter