More information. Issac Gleason (1724-1776), Phinehas Gleason's brother, died in January, 1776. Was this Rev. War related? Both were sons of Thomas Gleason & Priscilla Miller. Thomas was the son of John Gleason, son of Thomas Gleason & Susanna Page. Also, there was an Eliab Gleason, a fifer, at Fort Ticonderoga in 1777. Any information on Issac or Eliab?