Beatrice f. Latin beatrix 'she who blesses, makes happy, delights'.
The name of a 4th C Roman martyr, a 12th C queen consort of Sicily, a 13th C queen consort of Sicily, a 13th C queen of the Romans, a 13th C Italian saint, a 13th C queen of Hungary, a 13th C Holy Roman empress, a 13th C queen consort of Portugal, a 14th C queen of Portugal, a 14th C queen of Bohemia, a 14th C queen of Germany, a 14th C queen consort of Hungary, a 14th C queen of Sweden, a 15th C Portuguese saint, and a 15th C queen of Hungary and Bohemia.
The English diminutives Bet and Beton are witnessed in 1379 in the relational bynames Betsoñ (WRYPT1 p. 159) and Betonsoñ (WRYPT1 p. 18).