Arthur Frankau (February 1849 – 21 November 1904) was the son of Bavarian-born Joseph Frankau (previously Frankenau), a Jewish merchant who moved to London from Frankfurt in 1837. Arthur ran the firm successfully, but suffered a bad shock from a breach of verbal trust with a major supplier, and he soon died, to be replaced as head of the firm by his 21-year-old son, the future novelist Gilbert Frankau.