Ezra Weston II, also known as King Caesar, was a prominent shipbuilder and merchant who operated a large maritime industry based in Duxbury and Boston, Massachusetts. His father, Ezra Weston I, began small scale shipbuilding operations in Duxbury in 1763 and eventually came to be known as "King Caesar" for his success in business. Ezra Weston II, his only son, inherited the nickname when Ezra I died in 1822.

Duxbury is a historic seaside town in Plymouth County, Massachusetts, United States. A suburb located on the South Shore approximately 35 miles (56 km) to the southeast of Boston, the population was 16,090 at the 2020 census.