oooh an ache question!!!

valko and delan are easy ofc
valko, wolf, all first-born sons are given a wolf name

delan, raven, he comes from a family or spymasters known for using ravens (and things get extra fun post-resurrection)

damihan, dragon, but if you want an actual real animal.. a black swan (':

vaelnox, probably a fox or white peacock

soren, a stoat or ermine or something similar, or maybe a bear cub?