Ferdinand Louis Kerran (1883 – 1949) was a British political activist, prominent in the labour movement. Born in Chester, as Ferdinand Kehrhahn, Kerran's father was a German who had settled in England. Kerran joined the Independent Labour Party (ILP) in 1906, then the Social Democratic Federation in 1908. This became the British Socialist Party (BSP), in which Kerran was a prominent left-winger; by 1913, he was its National Trading Secretary. However, he was also active in the anti-semitic League for Clean Government, organising its campaign in the South Lanarkshire by-election, 1913.