Teela's "Father" in the flashback was covered in bandages to disguise his identity from the viewers. While he vaguely resembles Man-At-Arms, a different person was planned by the filmmakers. If not for the cancellation after season 2, an episode of season 3 would had revealed the identity of Teela's real father.
Prahvus come from the Latin word for "wicked, evil, depraved".
Flashback villain Prahvus was released as an action figure by Mattel through their Mattycollector online Club 200X subscription in December 2015.
Teela looks exactly like her mother in the Sorceress's youth.