He should not be confused with his great-uncle Christopher Harris (c.1553-1625) of Radford in the parish of Plymstock in Devon, MP for Plymouth in 1584, whose heir apparent he was.
He was the eldest son and heir of John Harris (1564- June 1623) of Lanrest, Recorder of the Borough of West Looe in Cornwall and MP for West Looe in Cornwall in 1614,[2] by his wife Joane Harte, daughter and sole heiress of Robert Harte of Plimston in the parish of Stoke Climsland in Cornwall.
In 1621 he was elected Member of Parliament for West Looe[4] in Cornwall.
He married Gertrude Grenville, a daughter of Sir Bernard Grenville (1567-1636), MP, lord of the manors of Bideford in Devon and of Stowe in the parish of Kilkhampton, Cornwall.
[4] He was succeeded by his younger brother John Harris (c.1596-1648), four times elected MP for Liskeard, who also inherited the estates of their great-uncle Sir Christopher Harris (c.1553-1625), MP for Plymouth in 1584,[5] of Radford in the parish of Plymstock in Devon.