Theadora is a spelling variant of Theodora, the feminine of the Greek Theodoros, which means "gift of God". Empress Theodora, wife of Justinian, was one of the most powerful women of the Byzantine world, and the name has returned with the revival of Theodore and the nickname Thea. Theadora rose from number 9122 in 2000 to a peak of number 1892 in 2024 and ranks number 2170 in 2025.