Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
TROW
As described in historical dictionaries
Patronymica Britannica (1860)
TROW. "Trow, Troy, and Try," says Mr. Ferguson, " are different forms of True; as old Frieslandic, trome, troiwe; German tren.""