I recently filled out a few gaps in my Don Newton DETECTIVE COMICS run, and this was revealed in DETECTIVE 501-502.
Way back before he was Bruce Wayne's butler, he was a British commando in World War II France, where he and Mlle. Marie (a French resistance fighter) had a shared adventure, and hooked up. Decades later, this story was done (April and May 1981) that revealed they had a daughter out of that union.
All right Alfred!
