tresayle

noun

1. A grandfather's grandfather; a great-great-grandfather.

   obsolete

   If any one wishes to speak of a great-great-grandfather (tresayle) through some side line, as his grandmother’s mother’s father, he has to use an explanatory mode like the above.

Where it comes from

From Middle French trisayeul, from Latin tris, tres (“three”) + French aïeul (“grandfather”). Compare besaiel, and see ayle.

Adapted from the Wiktionary entry tresayle (CC BY-SA 4.0).

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