Youngest child of blacksmith and farmer Angus MacAulay (1808 - 1878) and Ann McInnis (1814 - 1880) of Pinette, Belfast District, Queens County, Prince Edward Island ("PEI"), Canada.

Emigrated from Canada to USA. Claimed that he arrived in Boston, MA, on 20 May 1879, though he was enumerated by the 1881 Census of Canada at his parents' home on PEI. Resided in Dorchester neighborhood of Boston. Worked as a carpenter. Naturalized 23 Nov 1897 in the Circuit Court of the United States for the District of Massachusetts in Boston to become a citizen of the United States of America

Married 2 Jun 1892 in Boston to fellow immigrant from PEI, Imogene Burdett (1869 - 1928). They were parents of 8 children:

son John Angus (Allen as an adult) "Jack", born 12 Oct 1892 in unincorporated Strathcona area near Dundas, Kings County, PEI, Canada, and married first 14 Aug 1914 in Everett, Middlesex County, MA to Marie Alfreda Ohlson (1896 - 1979), had two daughters with her, Maria Marguerite (1917-1917) and Winona Alfreda (1919-1991), divorced from her and married second 14 Apr 1931 to Lillian May "Lilymay" Ferrell Bottis (1899 - 1966), and died 14 Jan 1971 in Lawrence, Essex County, MA.

daughter Celeste Estelle, born 29 Dec 1893 in Boston, Suffolk County, MA, married William James Winslow 21 Aug 1918 and died 24 Sep 1918 in Cambridge, Middlesex County, MA.

son William Burdett, born 23 Aug 1895 in Boston, Suffolk County, MA, married Lillian Elizabeth Dalton (abt 1900 - ?) about 1919, had 4 children with her and died 27 Oct 1956 in Braintree, Norfolk County, MA.

daughter Mary Victoria, born 4 Jun 1897 in Boston, Suffolk County, MA, married Harold R. Ripley (abt 1896 - ?), had one son with him and died 17 Sep 1925 in Boston, Suffolk County, MA.

son Frederick Norman "Fred", born 19 Nov 1900 in Boston, Suffolk County, MA, worked as an interior decorating painter, married Hilda Florence Elliott (1896 - 1978) 18 May 1924 in Boston, Suffolk County, MA, had one daughter with her and died Aug 1939.

son George Allen, born 8 Jun 1902 in Boston, Suffolk County, MA, and died 9 Oct 1902 in Boston, Suffolk County, MA.

daughter Margaret Imogene, born 11 Aug 1903 in Boston, Suffolk County, MA, married Leroy F. Lawrence (abt 1888 - ?) 21 May 1938 in Boston, Suffolk County, MA, and died 1 Oct 1956 in Boston, Suffolk County, MA.

daughter Ruth Anna, born 27 Dec 1905 in Boston, Suffolk County, MA, married Philip Valentine Pfeiffer (1907 - 1982) 5 Mar 1927 in Boston, Suffolk County, MA, had two children with him, Philip Francis (1927 - 1982) and Barbara Ann (1929 - 1996), and died 14 Dec 1993 in Weymouth, Norfolk County, MA.