Herbert Robin Cayzer, 1st Baron Rotherwick DL (23 July 1881 – 16 March 1958), known as Sir Herbert Cayzer, 1st Baronet, from 1924 to 1939, was a British shipping magnate and Conservative Party politician. Lord Rotherwick married Freda Penelope, daughter of William Hans Rathbourne, in 1911. He died in March 1958, aged 76, and was succeeded in his titles by his eldest son Herbert. Lady Rotherwick died in 1961.