Table 2.

Biological Relative Pairings Represented Among the Full Study Sample of 579 Individuals

Type of Relative Pairing	Number of Pairings	Degree of Relationship
Parent-offspring	221	First
Siblings	446	First
Grandparent-grandchild	32	Second
Avuncular	436	Second
Half-siblings	33	Second
Great avuncular	43	Third
Half-avuncular	19	Third
First cousins	486	Third
Half–grand avuncular	4	Fourth
First cousins once removed	442	Fourth
Half–first cousins	14	Fourth
First cousins twice removed	39	Fifth
Second cousins	284	Fifth
Second cousins once removed	166	Sixth
Third cousins	48	Seventh
Third cousins once removed	17	Eighth
Third cousins twice removed	8	Ninth
Fourth cousins	3	Ninth
Fourth cousins once removed	2	Tenth
Total number of pairings	2,743