sester-second cousin 

Child of their parent’s first cousin with their other parent’s sesqui-first cousin or are the child of their parent’s double-first cousin with their other parent’s half-first cousin.

My sester-second cousin is a good person.

sester-second cousin by Mr. Jacov November 23, 2019

sester-second-cousin 

Sester-2C:
Person who, in relation to the other person, has zero parents, zero grandparents and five great-grandparents in common.

My sester-second-cousin is a good person.

sester-second-cousin by Gerald128 May 15, 2021