...that "Tonicha" or "Tonisha" (like "Tonya") is a modern pet form of "Antonia", which is a feminine form of "Anthony".
From the BtN database:
ANTHONY (m) From the Roman family name Antonius, which is of unknown Etruscan origin. It is sometimes claimed to mean "flower" from Greek anthos. Mark Antony was the Roman general who ruled the Roman empire jointly with Augustus for a short time. Their relationship turned sour however, and he and his mistress Cleopatra were attacked and forced to commit suicide. Shakespeare's tragedy 'Antony and Cleopatra' is based on them. Also, Saint Anthony was a 3rd-century hermit from Egypt who founded monasticism.