Eigne
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
A corruption of the French word aine. Eldest, or first-born. It is frequently used in our old law books. Bastard eigne signifies an elder bastard when spoken of two children, one of whom was born before the marriage of his parents, and the other after. The latter is called mulier puisne.
Litt. § 399.