The eighth child of Pedro Amador and Ramona Noriega, Marcos Antonio was baptized April 26, 1793, at the San Francisco mission, SFD# 01289. His godparents were Hermenegildo Sal, alferez, and his wife, Josefa Amesquita.

Marcos Antonio was buried in the mission cemetery on the November 28th, 1829, SCL#06544, "soltero", died in town the day before.

He was raised with eleven siblings as the family followed Pedro Amador's military assignments:
1769 San Diego, Alta California PORTOLA EXPEDITION MEMBER
24 Sep 1786 Mission Santa Barbara, Alta California
Soldier of the company of the Royal Presidio of Santa Barbara
14 Jan 1791 Mission San Francisco Dolores, Alta California
Sergeant of the company of the immediate presidio - dau. Maria Antonia's Marriage record
9 Jan 1794 Monterey Presidio, Alta California
Sergeant of the Company of the Presidio of Our Father San Francisco
5 Apr 1808 Mission San Francisco Dolores, Alta California Graduate Ensign

Maria Antonia Amador
Born: 1776 in Loreto, Baja California, Mexico
Died: 30 JUN 1827 in Santa Cruz, Santa Cruz, California
Spouse: José Joaquin de Castro

Juan Pablo Amador
Born: about 1778 in Loreto, Baja California, Mexico
Died: 02 APR 1807 in San Francisco, San Francisco, California SFD#2438 "Sementerio de la Yglesia de esta Mision", "cavo de la compañia del Ynmediato Presidio"

José Fructuoso Amador
Born: about 1782 in Loreto, Baja California, Mexico
Died: 07 APR 1807 in San Francisco, San Francisco, California SFD#02439 soldado de la compañia del inmediato Presidio, buried in the cemetery the next day.

Maria del Carmen Amador
Born: about 1784 in California
Married Claudio Galinda, "cavo 1o de la 1a compañia franca de Voluntarios de Cataluña", May 18, 1797, SFD#558. Their son was:
Manuel José de la Santissima Trinidad Galindo
Baptism Date: 10 jun. 1805 (10 Jun 1805)
Baptism Place: San Miguel Arcángel, Perote, Veracruz, Mexico
Father: Claudio Galindo
Mother: Maria Del Carmen Amador
Name: Carlos Maria Galindo [age 30]
Marriage Date: 28 jul. 1831 (28 Jul 1831)
Marriage Place: Distrito Federal, Mexico
Father: Claudio Galindo
Mother: Maria del Carmen Amador
Spouse: Mariana Armas, [age 22]

José Onicifero Amador
Born: 06 SEP 1786 Baptized as Joseph Onesiforo de la Luz in Mission Santa Barbara, BP#29, September 24
JOSEPH ONESIFORO DE LA LUZ AMADOR
BAPTISMAL DATE: 24 SEP 1786
Died: 09 JAN 1794 in Carmel, Monterey, California SC #978

Maria Sinforosa Josefa Amador
Born: 17 JUL 1788 in San Francisco, San Francisco, California Baptized as Maria Simphorosa Josefa, "Yndia" SFD#706 July 22, 1788
Married Miguel Mendosa, "Soldado de la primera compañia franca de boluntarios de Catal.", SFD#638, August 10, 1800, at "Yglesia de el Real Presidio de San Francisco".
Her second marriage was to Dr. José María Pérez in 1814.
She died on December 10, 1841, at the age of 53, Xalapa, Veracruz, Mexico.

Maria Ygnacia Apolinaria Amador
Born: 23 JUL 1790 in San Francisco, California SFD#787, July 26, 1790
Died: 11 OCT 1869 in Santa Clara, California
Spouses: Nicolas Antonio Berreyesa, 1761-1804, a widower with seven children, SFD#1047, November 19, 1803,
Mariano de los Dolores Linares, from Sonora, SFD#1065, January 14, 1807,
and third, Josef Serafin Pinto, SFD#1113, April 5, 1808.

José Maria Amador, soldier at Santa Clara, then mayordomo at San Jose Mission
Born: 18 DEC 1794 in San Francisco, California SFD#1608
Died: about 1883 near Gilroy, California
Spouses: Maria Magdalena Trinidad Bernal, SCL #1846, May 25, 1818
Josefa Sanchez, SJS #1758, May 4, 1829,
Maria de la Soledad Alviso "Albizu", SJS #2508, January 13, 1844.

Rosa Maria Amador
Born: 15 MAR 1797 in San Francisco, San Francisco, California, baptized March 18, 1797, SFD#1899,
Died: about 1825 in Santa Cruz, California
Spouse: Francisco Solano Alviso

Lazaro de Gracia Amador
Born: 17 DEC 1801 in Santa Clara, California, baptized 22 DEC 1801 SCL #4173

His older siblings were in the 1790 Census in San Francisco:
Pedro Amador, sergeant, espanol, from Cocula [Jalisco], 51; wife Ramona Noriega, espanola, [from Loreto] 30; seven children: [Juan Pablo] 12; [Jose Fructuoso] 10; [Maria Antonia] 14; [Maria del Carmen] 7; [Jose Sinforoso] 4; [Maria Sinforosa] 2; [Maria Ignacia] three months {born 23 July 1790}. Missing from this census is an older half-brother, José Jacinto Amador, possibly because he had died young in Mexico. Also missing is an older half-sister, Maria Ygnacia Amador y Ruiz, born around 1770 in Real de San Antonio, daughter of Pedro Antonio Amador and his first wife, Maria de la Luz Ruiz from Loreto. The 1773-74 Rivera expedition lists this mother and daughter accompanying her soldier father. Without further documents, it appears Maria de la Luz Ruiz likely expired soon after, her father remarrying around 1775. Around 1785, Ygnacia married Francisco Xavier Alvarado from Loreto, who later retired as a sergeant: they had many prestigious children connected to the southern California missions.

Following his mother's death, his father Pedro married a third time, to widow Teresa Pinto, SCL# 1085, April 12, 1804.