Complex sentence: He was the only child of Winfield Scott Lovecraft (1853--1898), a traveling salesman of jewelry and precious metals, and Sarah Susan Phillips Lovecraft (1857--1921), who could trace her ancestry to the Massachusetts Bay Colony in 1631.
Split into simpler sentences: He was the only child of Winfield Scott Lovecraft (1853--1898) and Sarah Susan Phillips Lovecraft (1857--1921). His father was a traveling salesman of jewelry and precious metals, and his mother could trace her ancestry to the Massachusetts Bay Colony in 1631.