Hanham was the grandson of a Somerset gentleman who settled at Wimborne Minster in the mid-sixteenth century and served as Member for Poole in 1547 and Melcombe Regis in 1554. His father, Thomas, subsequently became recorder of the unified borough of Weymouth and Melcombe Regis, which he represented in the 1572 Parliament.
Hanham was returned for Weymouth in 1604, presumably with the backing of his family’s senior branch, which owned the nearby manor of Radipole. Weymouth’s corporation planned to introduce a bill to convert Radipole parish church into a chapel-of-ease, and Hanham may have aimed to guard the interests of his cousin James, who owned the living but was currently a minor. In the event, though, he played no known part in this measure’s passage.
Unlike his brother Thomas, who led an expedition to Maine in 1606, Hanham showed limited interest in colonial ventures. Although he joined the Virginia Company in 1612, he was sued in the following year for failing to pay his promised subscription of £37 10s.
