Alec Baldwin, like wife Hilaria, also sporting different name than one given at birth

Alec Baldwin, born Alexander Rae Baldwin III, was called Alex and even Xandy — until he transferred to NYU in the late ’70s and started going by the tonier "Alec."

source https://www.foxnews.com/entertainment/alec-baldwin-wife-hilaria-also-sporting-different-name