I hardly need add that the word "blond" is masculine (a female is a blonde)
Eh, it's a regional thing. Places far from French influence (say, parts of the US) often drop the gendered distinction. I've found there's about a 50/50 chance of an "English (US)" spellchecker choking on that extra E.
In other news, this is a very Golden Age Wondy, here. That's actually pretty cool. Especially given what was going on in her own title around this era.