quatrayle

English edit

Modified form of quadri- +‎ ayle.

quatrayle (plural quatrayles)

(rare) A great-great-great-grandfather; the grandfather of the grandfather of one's father.
- 1880, The New England Register, volume 34, New England Historic Genealogical Society, published 1996, page 433:
  He was the quatrayle of Zaccheus Gould, the New England immigrant.
- 2012, Oliviu Felecan, Name and Naming: Synchronic and Diachronic Perspectives, page 80:
  This means that two individuals A and B whose most recent common ancestor C is the quatrayle (or great-great-great-grandfather) of the former and the quatrayle of the latter cannot belong to the same lineage, because the genealogical chain linking A to B contains ten degrees of kinship.

grandfather of one's great-grandparent