Cousinal

Buf if anything the avuncular correlation is less than the cousinal, and accordingly I am not sure that the age and environmental differences would do more than equalise their values.

Source: wiktionary

First cousinal marriages were very frequent in colonial Maryland.

Source: wiktionary

As defining the types there are two considerations to be noted, (i) a difference of sex in either generation, parental or cousinal, and (ii) a change of sex in descent.

Source: wiktionary

He did not ask Nora how much she knew, not wanting to raise the judgment Rairia had made it clear that not only herself but Nora and Lim and Gwen and Nance and probably the whole family to its furthest cousinal reaches as well as the Regional Planning Board and their local dry cleaner had darkly passed on him.

Source: wiktionary