Juan Adelarpe Alonso (13 December 1927 – 8 September 1994), sometimes called Juanito Alonso, was a Spanish footballer who played as a goalkeeper for Real Madrid and was part of their European Cup victories in 1956, 1957 and 1958. He earned 2 caps for the Spain national football team. Alonso won the Ricardo Zamora Trophy during the 1954–55 season.