Sgt. John Alcock was born in Co. Kent, England. He took the oath of freeman in 1652. He owned land on 16 Jun 1653 in Georgeana, York Co., Province of Maine, Massachusetts. He died before 4 Jul 1675 in York, York Co., Province of Maine, Massachusetts. He was a planter. He was married to Elizabeth.

Elizabeth died in 1692 in York, York Co., Province of Maine, Massachusetts. Children were:

i. Mary Alcock was born in 1632.
ii. Sgt. Joseph Alcott.
iii. Elizabeth Alcott.
iv. Job Alcock was born about 1638. He signed a will on 2 Dec 1712. He died in 1714. His estate was probated in 1716. He was a shipwright/magistrate.
v. Sarah Alcott was born about 1642 in Kittery, York Co., Province of Maine, Massachusetts. She died on 29 Dec 1711 in Gloucester, Essex Co., Massachusetts.
vi. Samuel Alcock.
vii. Ens. John Alcock.
viii. Hannah Alcock.
ix. Lydia Alcock.