Othar is a Motihaul adventurer
http://mansionofe.the-comic.org/comics/pl/1396579
he disappeared http://mansionofe.the-comic.org/comics/pl/1398467
he explored the fringes http://mansionofe.the-comic.org/comics/1437
Othar had a a trick to breath in salt water. http://mansionofe.the-comic.org/comics/3153 http://mansionofe.the-comic.org/comics/pl/1399129
Son: Otharson: Bright, but not an adventurer. http://mansionofe.the-comic.org/comics/pl/1400269
Othera is Othar's granddaughter ("grandtad"). http://mansionofe.the-comic.org/comics/pl/1017385
Othar is a shoutout to Othar Tryggvassen in the Girl Genius comic.