Where does “hombruna” come from?

hombruna (Spanish) comes from Spanish hombre, from Old Spanish omne, from Latin homō, from Old Latin hemō, from Proto-Italic hemō, from Proto-Indo-European ǵʰmṓ, from Proto-Indo-European dʰéǵʰōm, from Proto-Indo-European -ōm.

hombruna (Spanish): tomboy, masculine-looking woman