William was born to a wealthy family on Mastic Neck,<ref>[https://www.google.com/books/edition/The_William_Floyd_Estate_Fire_Island_Nat/SciSIxxBlVAC?hl=en&gbpv=1&pg=PA5 The William Floyd Estate, Fire Island National Seashore, New York]</ref> Long Island, to Nicholl and Tabitha Smith Floyd.<ref>[https://www.google.com/books/edition/Chapter_Sketches_Connecticut_Daughters_o/wQgWAAAAYAAJ?hl=en&gbpv=1&pg=PA262 Chapter Sketches, Connecticut Daughters of the American Revolution]</ref> His father died in 1755 when William was a teenager.<ref>[https://www.google.com/books/edition/Records_of_the_Town_of_Smithtown_Long_Is/HwQ1AAAAIAAJ?hl=en&gbpv=1&pg=PA366 Records of the Town of Smithtown, Long Island, N.Y.]</ref> An education became secondary to the operations of the family farm. | William was born to a wealthy family on Mastic Neck,<ref>[https://www.google.com/books/edition/The_William_Floyd_Estate_Fire_Island_Nat/SciSIxxBlVAC?hl=en&gbpv=1&pg=PA5 The William Floyd Estate, Fire Island National Seashore, New York]</ref> Long Island, to Nicholl and Tabitha Smith Floyd.<ref>[https://www.google.com/books/edition/Chapter_Sketches_Connecticut_Daughters_o/wQgWAAAAYAAJ?hl=en&gbpv=1&pg=PA262 Chapter Sketches, Connecticut Daughters of the American Revolution]</ref> His father died in 1755 when William was a teenager.<ref>[https://www.google.com/books/edition/Records_of_the_Town_of_Smithtown_Long_Is/HwQ1AAAAIAAJ?hl=en&gbpv=1&pg=PA366 Records of the Town of Smithtown, Long Island, N.Y.]</ref> An education became secondary to the operations of the family farm. |