Complex sentence: He was succeeded by his son, the second Baron, Andrew Stewart (1590-1639), who one year before the death of his father had in 1628 been created a Baronet in the Baronetage of Nova Scotia.
Split into simpler sentences: He was succeeded by his son, the second Baron. He had already in 1628, one year before he succeeded his father in the barony, been created a Baronet in the Baronetage of Nova Scotia.