Philip Jourdain (1879-1919), British mathematician and logician
Millicent Jourdain, aka Joan Arden (1872-1926)
1909
Isis (journal), 1923 Vol. 5 Num. 1 pages 132-133: <a rel="nofollow" class="external free" href="https://www.jstor.org/stable/223602">https://www.jstor.org/stable/223602</a>