John Seaman emigrated to America with the Winthrop's Fleet in 1630. He was one of the original purchasers of the town of Stamford, Connecticut, where he settled in 1641. He went to Wethersfield, Connecticut where he owned some land.

During the Pequod War in 1646, he was given to be command of one of the companies. That made him a title of Captain.

He was one of the 62 original signers (in Connecticut) of the Hempstead compact of land, and in 1647 he settled in Hempstead, New York where he became one of the most prominent men for half a century, "and had left such a host of descendants as to be remarkable, genealogically."

In 1665 he became Captain of Queen County Troop Province of New York, and served on a Grand Jury in Hempstead.

European settlement in Long Island began with the arrival of Capt. Seaman, a native of Seaford, East Sussex, England. After obtaining the patent for the area from the Massapequa Indians, he oversaw the creation of Jerusalem South, the first European name given to the town which was to become Seaford where he founded. It was also widely referred to as Seaman's Neck.

In 1644, he built a house nicknamed "Cherrywood" on the intersection of Jerusalem and Wantagh Avenues in Jerusalem (now Wantagh, New York) where he was a pioneer settler and patentee of Hempstead Purchase.

He was a staunch defender of religious liberty. He moved to Hempstead where he died. He was interred at Seaman Family Burying Ground in Hempstead that was obiterated some years later. His body and gravesite are lost, but his descendants are still going on.

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Captain John Seaman was born between 1603-1610 in Essex, England, and died 1695 in Hempstead, Queens County (now Nassau County), New York.

He married (1) Elizabeth Strickland in 1644, daughter of John Strickland and Jane Fenwick. She died about 1654. He married (2) Martha Moore in 1655, daughter of Thomas Moore and Martha Young. She was born in England and died in 1698 in Hempstead, Queens County (now Nassau County), New York.

[from Bunker, Mary Powell, "Long Island Genealogies" (Albany, New York: J. Munsell's Sons, 1895), page 291]

Captain John Seaman was twice married. He married first in 1644, Elizabeth Strickland, daughter of John and Jane Strickland of Charlestown, Mass. They had four sons and one daughters. Children of John Seaman and Elizabeth Strickland are:

1. John Seaman, Jr., born about 1645; died about 1697.
2. Jonathan Seaman, born about 1647; died before Nov 13, 1729.
3. Benjamin Seaman, born between 1649-1650; died before Nov 5, 1733.
4. Solomon Seaman, born about 1651; died before March 13, 1748.
5. Elizabeth Seaman, born about 1653; died unknown.

Captain John Seaman married second in 1655, Martha Moore, daughter of Thomas and Martha (Young) Moore of Southhold, Long Island. They had four sons and seven daughters. Children of John Seaman and Martha Moore are:

1. Thomas Seaman, died before Dec 29, 1724.
2. Nathaniel Seaman, died Oct 9, 1757.
3. Sarah Seaman, died unknown.
4. Martha Seaman, died July 6, 1712.
5. Deborah Seaman, died Unknown.
6. Hannah Seaman, died about 1695.
7. Elizabeth Seaman, died 1699.
8. Daughter Seaman, died before 1695.
9. Mary Seaman, died unknown.
10. Samuel Seaman, born 1668; died 1732.
11. Richard Seaman, born about 1673; died Sep 25, 1749.

[from Seaman, Mary Thomas, "The Seaman Family in America...," (New York: TA Wright, 1928) page 21]