Married Eleanor Thompson according to Sayre family; lineage of Thomas Sayre, a founder of Southampton by Banta, Theodore Melvin, 1834-
John is described as a Loyalist to Britain in The New York Genealogical and Biographical Record, and resident of New Brunswick in 1784. (separate record for his father Rev John Sayre).
He is mentioned in the land release after his father's death (releasing any claim on the land in New Brunswick to James his brother).
"He continued to live in New Brunswick" (his mother left and returned to the United States, but other siblings stayed)[1]
Banta has an extensive genealogy for 6 of John's children:
JOHN SAYRE, born Dec. 10, 1764; married Eleanor Thompson, an English lady. He was a sea captain. He drew lot No. 37, at St. John, N. B., in 1784. He resided, in 1816, in Baltimore, Md., and had seven children. He was still living in 1851.
CHILDREN:
1) JOHN C., b. in England ; m. in Virginia, Harriet Wood. He was a cabinet maker. His children. 1 Theophilus. 2 John. 3 Columbus. 4 Vener Randolph. 5 Emily. 6 Virginia.
2) JAMES THOMPSON, b. in Baltimore, Feb. 22, 1803; m. 1st, Ellen McDonald, who was born in Scotland; 2d, March 12, 1833, Caroline (Hall) Eichelberger, who was born in Baltimore, Sept. 23, 1803, and died in Baltimore, Jan. 9, 1865. He was a tobacconist and died in Baltimore, Dec. 26, 1879. JAMES' CHILDREN, BY FIRST MARRIAGE: 1. William Henry, b. in Washington, D. C, 1832 ; m. Jan. 2, 1862, Sarah Elizabeth Hamilton; b. in Baltimore Co., Md., 1843. They reside in Baltimore. WH's CHILD: 1. Ivan Hamilton, b. Aug. 10, 1863; m. Aug. 25, 1893, Maggie H. Zile. Ivan's CHILD: Walter Elmer, b. May 31, 1894. 2. Minnie Jane, b. Sept. 28, 1866 ; m. May 16, 1883, Thomas J. Hasson d. Jan. I, 1894. CHILD: Sarah Etta Hasson, b. Sept. 28, 1884. 3. Elizabeth May, b. Jan. 30, 1873. 4. Francis Talbot, b. Feb. I, 1881 ; d. Nov. 26, 1882. JAMES' CHILD BY SECOND MARRIAGE: 5. Laura Eliza, b. in Baltimore, Jan. 1, 1834; m. March 13, 1859, George Henry Stewart, a machinist, who was born in Virginia, April 7, 1834, and died in Baltimore, Sept. 27, 1891. Laura's children (plus four died in infancy). 1 George Whaley Stewart, m. Dec. 19, 1884, Edith Kent. 2 Lillian Irene Stewart, m. July 9, 1891, Frank L. Kilmer. They all reside in Baltimore. 3 Evelina Josephine, b. Dec. 2, 1836 ; m. Benjamin Alonzo Davis, and died Oct. 23, 1889. 4 James Louis, b. May 8, 1838; m. Sept. 19, 1878, Josephine May Hill, who was born in Augusta, Ga., May 25, 1854. He died June 30, 1881. child. James Lewis, b. Aug. 8, 1879.
3) FRANCIS, b. in Baltimore; m. there, Harriet Winters. He was a cane and whip maker; d. in New York. CHILDREN. 1. George. 2 Thomas. 3 William, living in California.
4) THOMAS, 7 b. in Baltimore; d. unmarried, in York, Pa.
5) HENRY, 7 b. and d. in Baltimore, unmarried.
6) ELEANOR, 7 b. and d. in Baltimore, unmarried.