Lineal descendant

(Law) person who is a direct offspring, direct descendant (children and their children down through the generations, including grandchildren, great-grandchildren and so forth)

A person who is a direct descendant such as a child to his or her natural parent. - (read more on Lineal descendant)
  

Individual tracing his or her ancestry directly and without interruption through the traditional kinship system of his/her group to a known individual. Used in compliance with NAGPRA, the lineal descendant has priority claim over human remains or funerary/sacred objects of his/her direct ancestor.