Thomas Grozier is an Alderman of the City, having previously served as the fourth Lord Mayor after the rediscovery of the City Charter. he bears a striking resemblance to Thomas the Pardoner, who was seen (and heard) at Pennsic about fifteen years ago and has been seen more recently at occasional events.
Thomas also bears a resemblance to the "AEthelclan": AEthelwold Mierca, a former Seneschal of the Canton of Eoforwic during its tenth Anniversary (pre-rediscovery of the Charter) during the heady days of the inception of Ealdormere and the first Champion's Tournament through the dark days of the proscription and the Erroneously Acclaimed Legal District in Ontario, Really Mundanely Existing for Reporting Exclusively (often known by its acronym: E.A.L.D.O.R.M.E.R.E.). AEthelwold went on a quest to find Prester John and did not return. His brother AEthelstan was seen for a while afterwards, before he disappeared around the time of Thomas' first appearance.
In general, he's been active in Eoforwic (in one form or another) since about A.S. 17 or so (25 years this September) having joined at approximately the same time as Gunnar Halfdan of Lund, with a break of about 8 or 9 years from Gunnar(II) to Ysabeau(I).