Wikia

Alternate timeline
(covers information from an alternate timeline)

He was paged to forward a combat report over the ship's intercom shortly after the ship encountered the USS Enterprise-C near a temporal rift in 2366. (TNG: "Yesterday's Enterprise")

It is not clear if Ensign Thoms was a crewmember in the "regular" version of the timeline.
Thoms was named after special effects artist Wil Thoms.

Thoms