| Apologist/Author | Nationality | Occupation and/or Affiliation | Work(s) (Click on title to open) |
| Illingworth, John Richardson (1848 ~ 1915) | English | Anglican Priest | – Reason & Revelation: An Essay in Christian Apology (1903) |
| Ingraham, John Phillips Thurston (1817 ~ 1906) | American | Episcopalian Minister | – Why We Believe the Bible: An Hour’s Reading for Busy People (1885) |
| Innes, Alexander Taylor (1833 ~ 1912) | Scottish | Lawyer, Church Historian | – The Trial of Jesus Christ: A Legal Monograph (1899) |
