Before we knew if we were having a girl or a boy, Irene and I had settled on a boy name and a girl name after undergoing a rigorous search process. (The
process was us throwing out random French inspired names that work in English and in French and that have several easy to form
diminutives . Then we threw most of them out: "too girly sounding for a boy", "too easy to make fun of in English", "Too hard for Chinese relatives to pronounce", etc.) Eventually we settled on "Isabelle" and "Alexandre" in round one.
Then, for child two - we waited until we knew the gender and then had a short conversation that went like this "Hmmm, should we use the Alexandre? We liked that one before."
"Nah, that was Isabelle's boy name - can't use it."