See also

• Harry ILLINGWORTH's parents: Johnathan ILLINGWORTH (1838-1912) and Emma (Ellen) SYKES (1839-1918)
• Harry ILLINGWORTH's siblings: Joe Sykes ILLINGWORTH (1862- ), Arthur ILLINGWORTH (1864- ), Elizabeth ILLINGWORTH (1869- ), Thomas Sykes ILLINGWORTH (1871- ), Ernest ILLINGWORTH (1873-1954), Mary Jane ILLINGWORTH (1877- ) and Edith ILLINGWORTH (1879- )