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I am crying and going to politely ignore that this is true.
Batfamily nicknames (Because I will remain willingly ignorant):
Bruce Wayne: "B" (or occasionally "Dad" sometimes "Bruce") الخفافيش (by Damian and yes it is the exact name of "bat" I am multi-bilingual) Detective ( f u Ra )
Alfred Pennyworth (the immortal man): "Alfe"
Richard "Dick" Grayson: ("Dick" is more like his name soo) Big bird "Wing" "Dickie"
Cassandra "Cass" Wayne (not Cain): (like Dick but with Cass) "BB" "Mini-Bat" works to I guess
Jason Todd-Wayne: Jay, Jaylad, Jaybird, Blue Jay, Baby bird Dead man walking
Tim Drake-Wayne: Timmy ,Timabella, Timderly, Tim-tam (Yes I am aware that the 2 & 3 are supposed to be insults but I like them and I feel like a first they would be but then they would start not to be)
Damian Wayne: Dami, Baby bat, Demon brat (same idea as Tim with his nicknames) al-witwat (that bat flaping sounds((love that idea)) )
Steph Brown: Steph (Ov) "S" (by Cass when she Signs) Bruce's future child
Barbra Gordan: "Babs", "O" "Babe" (as a joke from Dick and only he says it)
Jim Gordan: Detective "hn" ( guess how says this) Jim-Jim ( no idea who would call him this but oh well)
Fun fact: Canonically, nobody in the batfam has been called 'baby bird' or 'baby bat'. Apart from Duke. They have always been Duke's nicknames.