On a side note, according to the historical materials Chiyo was the mother of Tadataka's four children who had been born between 1605-1609 in Kyoto, that were Toku (later, the wife of Saneharu SAIONJI, the Minister of the Left), Yoshi, Fuku (later, the wife of Michishiki KUZE, the first of the KUZE family), and Man (who died prematurely).
なお、史料では、1605-1609年に京都で忠隆に生まれた子供の徳（後に左大臣・西園寺実晴室）、吉、福（後に久世家初代・久世通式室）、万（早世）の4子女の母は千世であるとしている。