On November 6, 1799, Mason was married to Mary Means (1777–1858), daughter of Robert Means and Mary (
née McGregor) Means. Mary was a sister of Elizabeth Means, wife of
Congregationalist minister
Jesse Appleton, parents of
Jane Means Appleton (wife of the 14th
U.S. President Franklin Pierce). They were the parents of eight children, including: • Robert Means Mason (1810–1879), who married Sarah Ellen Francis (1819–1865), daughter of Ebenezer Francis and Elizabeth (née Thorndike) Francis, in 1843. • Charles Mason (1812–1862), the Rector of
Grace Church in Boston who married Susannah Lawrence (1817–1844), a daughter of the wealthy merchant
Amos Lawrence. After her death, he married Anna Huntington Lyman (1821–1883) in 1849. Anna's sister was married to agricultural writer
Richard L. Allen. Mason died in Boston on October 14, 1848. He was interred in
Mount Auburn Cemetery,
Cambridge, Massachusetts.
Descendants Through his son Robert, he was a grandfather of Elizabeth Mason (1844–1924), who married Robert Charles Winthrop Jr. (son of U.S. Senator and former
Speaker of the House of Representatives Robert Charles Winthrop) on June 1, 1869 (ancestors of
U.S. Secretary of State John Kerry). He was also the grandfather of
Ellen Francis Mason, Alfred Mason, Anna Frances Mason, Clara Thorndike Mason, and Ida Means Mason. ==References==