Multiple realities(covers information from several alternate timelines)
Bill George was a Starfleet officer in the 24th century.
In 2372, he was listed as a Research and Development officer on the dedication plaque of the USS Enterprise-E. (Star Trek: First Contact, dedication plaque)
In an unknown, alternate future timeframe, he was listed as a Advanced Technologies officer on the dedication plaque of the USS Pasteur. (TNG: "All Good Things..." dedication plaque)
This character was only mentioned in writing.
He was named after ILM
model maker and visual effects art director Bill George