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Webster 1913 Edition

(kĭnz′woŏmˊan)

Noun.

;

pl.

Kinswomen

(kĭnz′wĭmˊĕn)

A female relative.

Shak.

Noun.

A female relation.

kinswoman ‎(plural kinswomen)

A female relative.
- 1822, Alain René Le Sage, The Adventures of Gil Blas of Santillane
  Don Huberto actually fell in love with his kinswoman, and had presumption enough to declare his passion […]

a female relative