Manly and masculine
Anddy is a modern creative spelling of Andy, which is the diminutive form of Andrew. It ultimately derives from the Greek name Andreas, signifying bravery and strength. While the double-d spelling is rare, it retains the friendly, approachable energy of the traditional nickname.
Less common today
Anddy isn't in the latest US Top 1000. It last peaked at #7,110 in 1999.
US births per 5-year period, 1990βpresent (SSA data).