ancestor

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an·ces·tor

(an'ses-tōr),
A person in the direct line of descent from which a subject of interest is derived (for example, parents or grandparents; but no collaterals or descendants).

ancestor

(ăn′sĕs′tər)
n.
1. A person from whom one is descended, especially if more remote than a grandparent; a forebear.
2. Biology The actual or hypothetical organism or stock from which later kinds evolved.

ancestor

Etymology: L, antecessorem
one from whom a person is descended, through the mother or the father. The term assumes a direct line of descent, excluding collateral family members of previous generations.
References in periodicals archive ?
Regarding the external threat, the person in need of God's protection is no longer Sarah, the endangered ancestress whose purity is threatened, but .
They descend from the 1974 Irish 1,000 Guineas heroine Gaily, also the ancestress of Pilsudski, Youmzain and Creachadoir.
This is the family of Xaar, Cityscape and Bated Breath tracing to Best In Show, the granddam of El Gran Senor and ancestress of too many brilliant horses to mention.
Gaining that elusive Group 1 winner would uphold family honour for Ionian Sea, whose last recorded foal was a two-year-old filly by Galileo and so a sister to Imperial Monarch, as her Matron Stakes-winning grand-dam is ancestress of top-flight scorers Pressing, Mastercrafstman and Sakhee.
Last year's winner Fame And Glory is out of a daughter of German 1,000 Guineas winner Grimpola, who was imported into Britain by Plantation Stud in 1985 and is also the ancestress of Lillie Langtry Stakes winner Gravitation.
Superstar Leo's grand-dam Dancing Rocks was third in the 1982 Coronation Stakes and she is also ancestress of last year's Coventry Stakes winner Power and his Ribblesdale Stakes-winning half-sister Thakafaat, Queen's Vase winner Mahler and King Edward VII Stakes third Alexander Pope.
Valima is one of two winners out of a halfsister to top miler Val Royal and descends from Vadlava, also the ancestress of Group1 winners Valixir and Vadawina.
Like Coquet, Shirocco Star boasts a strong Meon Valley foundation; her dam is a half-sister to Irish 2,0 Guineas runner-up France and descends from Reprocolor, also ancestress of German 2,0 Guineas winner Caspar Netscher.
Zarzaya's conformation may explain how Forien was able to buy so cheaply a mare out of Petite Etoile's only daughter Zahra, who later became ancestress of Zarkava.
Munnaya is a Nijinsky granddaughter of Canadian champion Kamar, also the ancestress of Fantastic Light, Turbulent Descent and Music Show.