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Webster 1913 Edition

Noun.

Antiquity; what is ancient.

They contain not word of

ancientry

West.

Old age; also, old people.

[R.]

Wronging the

ancientry

Shakespeare

Ancient lineage; ancestry; dignity of birth.

A gentleman of more

ancientry

than estate.

Fuller.

Noun.

Dignity of birth; the honor of ancient lineage.

ancientry ‎(plural ancientries)

(archaic) The quality or fact of being ancient or very old.
(archaic) Old-fashioned style, elaborate ceremony.
- 1888, Rudyard Kipling, ‘His Chance in Life’, Plain Tales from the Hills, Folio 2005, p. 58:
  So he and Miss Vezzis were married with great state and ancientry; and now there are several little D'Cruzes sprawling about the verandahs of the Central Telegraph Office.
(archaic) The olden days; antiquity.