A judge ordered 44-year-old Sam Lutfi, who has been in legal fights with the Spears family for a decade, to stay at least 200 yards (183 metres) from her, her parents and her two sons, who are 12 and 13.
The judge also ordered that he not contact or disparage anyone from the family.
The restraining order petition alleges Lutfi has been sending harassing and threatening texts to Spears' family and disparaging them on social media.
