Say ciao to Trolley Square's Ciao Pizza and Grill and buongiorno to Gianni's Pizza.

The 15-year-old Wilmington pizzeria at the corner of Delaware Avenue and Clayton Street is changing its name as of Aug. 15.

The Wilmington shop, which has not been sold and is operating under the same owners, soon will be called Gianni Pizza and Grill.

Signs in the windows and at the counter of the pizza shop said that due to a trademark issue, the business, owned by the Esposito family, is changing its name.

There is a Ciao Pizza & Pasta in the Prices Corner Shopping Center and Ciao Pizza & Pasta in Newark's University Plaza. They are under different ownership and are no longer affiliated with the Trolley Square location.

Ciao Pizza & Pasta in the Prices Corner Shopping Center 3218 Kirkwood Highway has been serving customers for 30 years.

Prices Corner Manager Billy Moneta said the Trolley Square location had once been a franchise of the Ciao operation, but has since split amicably with the organization.

He said the name of the Prices Corner location is staying the same as it always been. "We're an institution," Moneta said.

Signs hanging up at the Wilmington shop in Trolley Square read: "As always, we will continue to serve you with the same devotion and quality which you have come to expect from us. It will be a pleasure to do business with you in the future under our new name."

With its glowing neon sign, the city pizzeria at 1600 Delaware Ave. is one of Trolley Square's most recognizable sites. It has undergone some other changes in recent years including upgrades to the outdoor patio, an expanded menu with gluten-free pizza and the addition of beer.

Takeout menus at the pizzeria have already been changed to reflect the new name.

"Same people, same food, different name," reads the tagline on the new Gianni Pizza and Grill menu.

For more information, visit the Gianni's Facebook page or call (302) 654-5331.

Contact Patricia Talorico at (302) 324-2861 or ptalorico@delawareonline.com and on Twitter @pattytalorico