LXXXI quintupled, 3 letters
Multiple of CXXXV, 3 letters
Quarter of MDCXX, 3 letters
XLV x IX, 3 letters
406, in old Rome, 4 letters
406, in Roman numerals, 4 letters
406, long ago, 4 letters
Caesar's 406, 4 letters
CCIII doubled, 4 letters
Nero's 406, 4 letters
Year Attila the Hun was born, 4 letters
407, 5 letters