James Boswell's uncle John was a member of a sect known as the Glasites.
Life with Boswell:
On October 10, 1764 Boswell described O'Carroll in his journal as “an obliging sort of man, but very formal. He was just Mr. Carron at Utrecht in regimentals.”
Note 1: Only source used for this article is Boswell on the Grand Tour I, 1763-1764.