For Dweezil Zappa, one name change was not enough.

In April, Mr. Zappa, a guitarist and one of the four children of the rock composer Frank Zappa, changed the name of his project Zappa Plays Zappa — a tribute to his father’s music — to Dweezil Zappa Plays Frank Zappa. Clunky, perhaps, but he said it was necessary to avoid legal conflict with his brother, Ahmet, who controls the Zappa intellectual property through a family trust.

Now, after yet another legal tussle between the brothers, Dweezil is rechristening the show again. His next tour, starting July 1 in El Prado, N.M., will be called “50 Years of Frank: Dweezil Zappa Plays Whatever the Heck He Wants — The Cease and Desist Tour.” (Instead of “heck,” the tour uses a vulgarity.)

“We are incorporating the absurdity,” Mr. Zappa said in an interview.

The 50 years refers to the anniversary of “Freak Out!,” the debut album from his father’s band, the Mothers of Invention.

The Zappa brothers, once musical partners, have clashed since the death of their mother, Gail, last year. The Zappa Family Trust now has two trustees, Ahmet and Diva Zappa; Dweezil and his sister Moon are beneficiaries. Frank Zappa died in 1993.