A man who gave his children Nazi-inspired names has dressed up in full fascist regalia as he appeared in a US court seeking to secure visitation rights to his youngest son.

Heath Campbell - father of Adolf Hitler Campbell, 7, JoyceLynn Aryan Nation Campbell, 6, Honzlynn Jeannie Campbell, 5, and 18-month-old Heinrich Hons Campbell - donned a German Nazi uniform for the hearing in Flemington, New Jersey.

The 40-year-old, who also sports a large swastika tattoo on his neck, was appearing before the court in a bid to win the right to see Heinrich Hons, who was taken into care by social services soon after his birth in November 2011.

Heinrich's elder siblings had already been taken into care in 2009.

"I'm going to tell the judge I love my children. I wanna be a father, let me be it," Mr Campbell told NBC10 before the hearing.

The family hit the headlines in 2008 when a supermarket refused to write Adolf Hitler on a cake ordered for their eldest son.

However, Mr Campbell rejected claims by social workers that he had been violent towards his children in the past.

"Let me prove to the world that I am a good father," he said.

"I've never abused my children, I only name my children and I don't think it's right any more.

"Basically, what they're saying is because of my beliefs and I'm a Nazi, that us people don't have any constitutional rights to fight for our children."

Asked whether dressing up as a Nazi was likely to help his case, Mr Campbell was confident it would not be held against him: "If they're good judges and they're good people, they'll look within, not what's on the outside."