Theodore m. Greek Θεός 'God' + Greek δώρον 'gift'.
The name of a number of early saints and martyrs, an 8th C Byzantine saint, an 8th C Coptic pope, a 9th C Byzantine saint, a 9th C pope, a 13th C Russian prince and saint, two 13th Byzantine emperors, a 16th C tsar of Russia.
Not to be confused with Theodoric.