genealogist

n. person who studies genealogies

Genealogy (from Greek: γενεα, genea, "family"; and λόγος, logos, "knowledge") is the study and tracing of family pedigrees. This involves the collection of the names of relatives, both living and deceased, and establishing the relationships among them based on primary, secondary and/or circumstantial evidence or documentation, thus building up a cohesive family tree. Genealogy (often misspelled "geneology") is often also referred to as family history, although these terms may be used distinctly: the former being the basic study of who is related to whom; the latter involving more "fleshing out" of the lives and personal histories of the individuals involved.
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Noun
1. an expert in genealogy
(hypernym) expert

(n.)
One who traces genealogies or the descent of persons or families.
  

n.
نسل داں, بھاٹ