Dennis Alabaster was born 27 June 1860 in Baltimore, Maryland, United States to Spencer Alabaster (1835-1900) and Danielle Brugman (1840-1920) and died 28 April 1928 Baltimore, Maryland, United States of unspecified causes.
Children
| Name | Birth | Death | Joined with |
| James Alabaster (1888-1978) | 4 August 1888 Baltimore, Maryland, United States | 7 April 1978 Baltimore, Maryland, United States | Alyssa Mac Sitric (1890-1958) |
Siblings
| Name | Birth | Death | Joined with |
| Dennis Alabaster (1860-1928) | 27 June 1860 Baltimore, Maryland, United States | 28 April 1928 Baltimore, Maryland, United States | Maxine Keeley (1857-1930) |