Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
STALLION
As described in historical dictionaries
Patronymica Britannica (1860)
STALLION. The animal. Ilengist, the A-Saxon invader's name, doubtless meant the same thing — hcngst, a stallion.