Broadway scion Eric Nederlander is in trouble again — he turned himself in last night for allegedly violating an order of protection obtained by his girlfriend, The Post has learned.

Nederlander was charged with criminal contempt for violating the order and petit larceny for stealing keys after he arrived at the Sixth Precinct station house on West 10th Street, sources said.

It wasn’t clear exactly how he violated the order, obtained by Nancy Okun.

Nederlander was arrested in January for violating the order when he allegedly pulled Okun’s hair while she slept and accused her of cheating on him. Last July, he allegedly slammed her head into a taxi partition.

He’s battling his wife, Dr. Lindsey Kupferman, for custody of their 4-year-old daughter.