Matthias has been in the Frostwolf family for nearly three decades. He was not part of the family by birth but was married into the family.
His wife was from a distant branch of the family. As he was a commoner by birth, he entered the house and their son took his wife's surname.
In the beginning, everything was fine. He worked his ass off for the family so that his son would get some resources and recognition from the family. Everything was going as he intended until his son died.
He was far away when that happened and has no idea how he died. No one did. He died under mysterious circumstances and many were suspicious about his death but there was nothing was found.
He and his wife had only one child and she loved him with all his heart. She couldn't bear the loss of her son and committed suicide.