Kate Kane / Batwoman

New Earth

 * 1)  Renee Montoya  - These two were in a relationship long ago. They show renewed tension in 52, as Kate becomes Batwoman and Renee discovers her identity. After Kate is almost killed in a ritual sacrifice, and Renee saves her, the two rekindle their relationship. I am unsure where it went after that.

New 52

 * 1)  Sophie Moore 
 * 2)  Violet Paige  (implied)
 * 3)  Safiyah Sohail 
 * 4)  Anna 
 * 5)  Maggie Sawyer 
 * 6)  Rachele 
 * 7)  Maggie Sawyer  - These two got engaged, but the wedding was called off.

Bombshells

 * 1)  Renee Montoya  - These two are former lovers, meeting when Kate was a volunteer in Spain during the Spanish civil war and Renee was a Republican soldier.
 * 2)  Maggie Sawyer  and her are in a relationship

Injustice

 * 1)  Renee Montoya  and her were apparently an item until Renee died from overdosing on enhancement pills, trying to make herself superhuman.

Arkham

 * 1)  Maggie Sawyer  - Kate only has a brief voice appearance on Bruce Wayne's voicemail, hinting that she is actiev as Batwoman and asking Bruce if he is coming to her wedding to Maggie.