Né is the male version of née.
Just as née is used to identify a maiden name -- Alice Smith, née Jones -- né is used to identify a family name that a man previously used, but no longer does. This is almost never used, and when it is it may be missed by the listener, as English speakers pronounce both words the same: "nay".
A example of use would be "Bill Clinton, né Blythe", as Bill Clinton legally changed his name to that of his step father when he turned 15. However, one would not generally use it for a full name -- e.g., "Tiny Tim, né Herbert Butros Khaury" -- or for dead names. For example, Malcolm X changed his name to reference his unknown ancestral African surname while purposefully discarding his "white slave-master name"; "Malcolm X, né Little" would be offensive, and would presumably only ever be used as a particularly obtuse and pedantic insult.
Brevity Quest 2023