Cuthbert Welby Pugin (1840-1928) was a British architect. He was the son of Augustus Welby Pugin and his second wife Louisa Button, making him Pugin's fourth child and second son. He was brother of Edward Welby Pugin and Peter Paul Pugin, also both architects. He is most notable for his design of St John the Evangelist, Poulton-le-Fylde and his collaborations with Peter Paul to complete  St Anne's Church, Highfield Road and Heart of Jesus, Kilburn to designs by Edward. All three brothers also made additions and alterations to The Grange, Ramsgate, originally designed by their father.