Could
Leroy be short for Fauntleroy? I noticed both names come up together in early examples in Richmond
Virginia.
What other non-British surnames were there? I suppose Lafayette and
Marion came late 1700s.
Marion only counts on the technicality that
Francis Marion was from a French Huguenot family, not English.
Schuyler and
Yancy never got as popular by 1850s like
Leroy.