[name_f]Thallo[/name_f] (prn. Thah-low) is the greek goddess of spring & blossoms. But I really think sound wise [name_f]Thallo[/name_f] would make a great boys name.
And the meaning ‘bringer of blossoms’ I think is also really sweet.
I agree that it works sound-wise, but I’m always hesitant to gender-bend deity names as I think it could be borderline inappropriate? I know there have been discussions on here recently regarding the use of Greek deity names in particular that would make me hesitant to use it.
This is pretty much how I feel, as a Greek person. If you like the sound, maybe you could go for Thallow! It’s familiar because of names like Marlow & Harlow, and to me more respectful than genderbending a goddess’ name. Or Thales, which has the same meaning/origin but is actually male!
It definitely sounds masculine to me, and I love the meaning! I would also suggest [name_m]Philo[/name_m], since it has a similar sound and has origins as a masc name.