family tree; pedigree; genealogy
Refers to a chart or record showing family lineage, ancestry, or descent. Used in historical, legal, and everyday contexts.
He is researching his family's genealogy.
This family has a family tree dating back to the Edo period.
He traced his ancestors' family tree back to the Edo period.
My grandmother decided to draw up a family tree for her house.
That warlord's name is listed in an old family tree.
She researched her family's genealogy and was surprised by what she found.
系図 is the physical family-tree diagram or chart, while 系譜 is the lineage or line of descent itself (which a 系図 may depict).
Standard kanji spelling; high priority in news and frequency lists.
系 (lineage, system) + 図 (diagram, chart). The compound straightforwardly means 'lineage chart'.