Tonua is most certainly derived from Anthony (see hotlink for more). As far as Charymane, I surmise that it is derived from Charme, "Charmed" in French, which in turn is derived from the Latin *carmen*, meaning song, verse, incantation.
Tonya Charymane yields the following anagrams... - Aryan theomancy (yikes!) - Mean anarchy toy (ah! thats more like it!) - O my! Neat anarchy! (an oxymoron?) - An arty cam-honey (serving demanding cyber-voyeurs) - Annoy thy camera (opposite of the above)
...and the following Aliases... - Yonathan Creamy - Yonah Macartney - Tracey Moynahan - Chantay Maroney, etc etc