Acanthodes bronni. The species name has "bro" in it, and according to a study undertaken by Davis, Finarelli and Coates, the shark-like A. bronni is a member of the family.
|Wikipedia: Acanthodes bronni; your relative, a "few times" removed.|
For an understanding of the position human beings find themselves in comparison to A. bronni, have a read of this blogger post: Common ancestor for humans and sharks: Acanthodes bronni. This post provides a brief history of the lineage and traits of Gnathostomes (everything with a spine and jaws).
Love your Brother shark.