I'm super biased because Hephaestus is one of my favourite of the Greek gods (I have a few but it's hard to like a lot of them) but I do really like this name. It's not the hardest Greek name to say (that's not saying much but it's pretty easy) and the classic form (Hephaistos) is also very nice, just more uncommon. It can be (and usually is when Greek myth nerds are talking) shorted to Heph which I like. Heph was probably one of the nicest and calmest gods (it is hard to find that combo in myth, but Hades and Hestia were kinda okay) so that is a plus. Good namesake, good pronunciation, good meaning, good overall sound.
― Anonymous User 2/10/2019
3
Karl Kerenyi gives in "Mythologie der Griechen" simply the meaning of "hephaistos" as "fire".
●Hiefiest is Belarusian ●Khefest is Bulgarian ●Hefest is Bosnian, Catalan, Croatian, Macedonian, Serbian, and Ukrainian ●Hefaistos is Czech, Danish, Finnish, Norwegian, Romanian, and Slovak ●Hefesto is Esperanto, Galician, Portuguese, and Spanish ●Héphaïstos is French ●Ífaistos is Modern Greek ●Héphaisztosz is Hungarian ●Efesto is Italian ●Hefaistas is Lithuanian ●Hefajstos is Polish ●Gefest is Russian ●Hefajst is Slovenian.