As far as I can tell, Arthur Alexander is one of five artists covered by the Beatles and Rolling Stones:
Smokey Robinson and the Miracles
Alexander is the only songwriter whose songs were covered by the Beatles, Rollin Stones and Bob Dylan.
Alexander recorded his song Anna in 1962 and the Beatles covered it in 1963 on their first album. Alexander is a great singer who was later forgotten and made a comeback right before he passed away in 1993. His records are R&B with a strong infusion of country. Anna even has a Latin influence common in songs from that era like “Spanish Harlem”.
The cover by Roger McGuinn on the Alexander tribute album is wonderful.