Abraham Dirk Loman (16 September 1823, The Hague – 17 April 1897, Amsterdam) was a Dutch theologian.

He taught almost all disciplines of theology, but concentrated after 1867 on the New Testament and early Christian literature.

When his colleague Allard Pierson in 1878 denied the authenticity of Galatians, Loman wrote a fierce condemnation.

He was an advocate of the Christ myth theory and caused great consternation by a public lecture on 13 December 1881 in the building of the Vrije Gemeente where he stated that Jesus is not a figure of history and that all we know about him is second-century fiction.

[3] His arguments were that the Pauline epistles are not quoted by Justin Martyr and that the first datable references are by Marcion.