He married wife #1: Isabella (last name unknown) and together they had the following children.Wife of Robert, Isabella, is buried at Mt. Pleasant Cemetery, Hickory, PA. d. July 22, 184?. Robert and Euphamia probably separated/divorced around 1870. Later records show Robert living with a son from marriage #1 and Euphamia living with her brother, Henry Hastings. Euphamia died at Hastings Station, PA and is buried at Melrose Cemetery in Bridgeville, PA. Euphamia is the daughter of William and Mary Irwin Hastings.
- John Allender b. 1838 d. March 02, 1888
- Margaret Allender b. 1841 d. 1845
- Hannah Allender b. unknown d. 1841
Robert married wife #2: Euphamia "Effie" Hastings, Nov. 7, 1849. They had the following children:
- William Hastings Allender b. Dec. 1846 d. Sept. 11, 1932 Detroit, MI.
- Elizabeth Allender b. June 8, 1850 d. May 1, 1931
- James Allender b 1851 d. January 4, 1900
- Robert Buchanan Allender b. Jan 21, 1853 d. Oct 6, 1916
- Margaret Bell Allender b. July 6, 1854 d. January 1926
- Alice Allender b. 1860
- Thomas Fawcett Allender b. August 1868 d. January 12, 1934 This is my line