Dos batman know batwomans identity? if he did he'd know they are related, bruce's moms maiden name was kane. The kanes are a large industrial rich family that was always in the waynes shadow, Im not sure if the families got along really either? not sure. So if bruce is related to the kanes , wich he is, hed be related to bette kane the pre crisis batgirl from the 50's and current flamebird (im pretty sure thats her name). Also, kate kane, batwoman. Please comment to tell me if im right or if anyone knew this alreadyand im stupid. also tell me the relationship between batwoman and the batfamily. Did she just put the bat symbol on and not want anything to do with them?
The current Batwoman, Kate has not been shown to be related to Batman. Batman knows her identity, but she doesn't know his. There are theories on if they're related, but there's no proof. They could easily be distantly related though, what with the Waynes and Kanes being some of the first families of the Gotham.
She isn't a member of the Bat-Family, she just took on the symbol so that people would know she was a hero, as the bat is obviously a symbol of heroes in Gotham.
@jackbensley777: Yeah, and they're heroes. I think it's so she's not seen as a villain. Batman hasn't told her to not wear it, so he seems to be O.K. with it.
It could be distant, but we don't know at the moment. Having the same last name doesn't necessarily mean you need to be closely related.