Complex sentence: He had married Elizabeth, daughter of Robert Lovelace of Battersea, but the marriage produced no children and, following his death at Bath on 28 December 1777, the baronetcy passed to his nephew, Richard John Strachan who also became a distinguished Navy officer.
Split into simpler sentences: He had married Elizabeth, daughter of Robert Lovelace of Battersea, but the marriage produced no children. After his death the baronetcy passed to his nephew, Richard John Strachan who also became a distinguished Navy officer.