I love Beau, but think it’s a bit marmite!
Second favourite is Arlo, but I think it’s quite popular now... I also HATE ‘the good dinosaur’ movie and it makes me think of that. Having said that, I do like the name, the Guthrie connection and know a very gorgeous young Arlo. He is three and a half and Irish. Sounds especially nice in a rhotic accent imo!