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Ryan, Isaac (1805–1836)

Bill Groneman Biography Entry

Isaac Ryan, Alamo defender, son of John Jacob Ryan Sr. and Marie Ann Hargrave, was born at St. Landry Parish, Louisiana, on March 1, 1805. He took part in the siege of Bexar and served in the Alamo garrison as a member of Capt. Robert White's infantry company, the Bexar Guards. Ryan died in the battle of the Alamo on March 6, 1836.


Daughters of the American Revolution, The Alamo Heroes and Their Revolutionary Ancestors (San Antonio, 1976). Daughters of the Republic of Texas, Muster Rolls of the Texas Revolution (Austin, 1986). Bill Groneman, Alamo Defenders (Austin: Eakin, 1990). John H. Jenkins, ed., The Papers of the Texas Revolution, 1835–1836 (10 vols., Austin: Presidial Press, 1973).

Time Periods:

  • Texas Revolution

The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this entry.

Bill Groneman, “Ryan, Isaac,” Handbook of Texas Online, accessed June 24, 2021, https://www.tshaonline.org/handbook/entries/ryan-isaac.

Published by the Texas State Historical Association.

June 1, 1995
April 15, 2021

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