His name Motonobu (元信) is granting subordinates the use of a character from the superior's real name and is consisted of 'Moto' ('元') from Katsumoto HOSOKAWA and 'Shin' ('信') from the Takeda clan.
名前の元信は、管領家の通字の偏諱であり、細川勝元の「元」と武田家の通字「信」から成る。