The Giear or Gyer family was apparently unknown in Weymouth until the mid-sixteenth century. Its first member of local importance was probably Roger Gyer, who was named as one of the original capital burgesses of the united borough of Weymouth and Melcombe Regis in 1571, and served as bailiff in 1585.
Giear was returned for Weymouth in 1624, and received wages of 3s. 4d. a day.
The war with Spain and France during the later 1620s doubtless disrupted Giear’s mercantile operations, but he compensated for this by turning to privateering in 1627.
Giear took no known part in the Civil War, but remained active within Weymouth’s corporation until at least October 1645, when he helped to vote for a new recorder. He presumably died in the following year. In his will, drawn up on 17 Dec. 1642, he left £9 for charitable purposes in Weymouth and Melcombe Regis, provided a £300 dowry for his young daughter, and assigned to his wife his lease of a Dorset prebend and several other minor properties. The will was proved on 20 June 1646. No other members of this family entered Parliament.
