The song Theodius and his mother sing is an old Finnish lullaby, often referred to as “Nuku nuku” (you can find performances of the song if you search for that online). It’s not one I remember from my childhood, but I still like it a lot.
This is the first comic I ever drew that features Hilla, Theodius and Giendei’s daughter. She’s half-elven, half-nordling, so she has some features of both species.