of Portugal would have been 39 in the year 1521 (she died in 1517) 1122: Eleanor of Aquitaine was 34 in the year 1156 12: Caligula was 4 in the year 16. This sequence of birth years: 0, 2, 6, 12, 20, 30, 42, 56, 72, 90, 110… has an entry