Basicly, Geno and Gideon adopted a family of theives and Geno is the Dad and Gideon is the Mom
j/k.
The Durimes are a family of reformed Daveons, a race of black winged avaians with bloodlusting natures, much like vultures and other carrion birds. By clipping their wings, They abandoned the shadow magic held by their bretheren and the Durime clan was born.