The NHL Las Vegas expansion team trademarked the nicknames Desert Knights, Golden Knights and Silver Knights last week, a team spokesperson confirmed to NHL.com.
Detroithockey.net first reported the names on Aug 23.
Las Vegas was awarded an expansion team on June 22. It will begin play as the NHL's 31st team in the 2017-18 season.
On July 13, owner Bill Foley said he wanted to have a logo and nickname "ASAP," but copyright reasons have been an issue. He later said his goal is to have a logo, nickname and color scheme in place before two NHL preseason games are played at T-Mobile Arena on Oct. 7 and 8 (the Los Angeles Kings play the Dallas Stars and the Colorado Avalanche).
"My goal is to have a name that I can create a culture around and people, the players and the fans will understand the connection and the names of the team and it has to stand for a lot of things that I strongly believe in, perseverance, dedication, honor, never give up, never give in," he said. "All these things I'm trying to put together with a name.
"We want the name to fit our goals and what we're trying to accomplish, and I'm really confident that we're going to hit it and do really well."
Foley, a graduate of the U.S. Military Academy, said one of his first choices was Black Knights, the nickname used at West Point, but it didn't go over well with hockey fans.
"I do listen to what the fans are saying. Black Knights is not a popular name generally speaking amongst the fans," Foley said. "I think they would have loved it because I had a real plan in place about what the Black Knight would be and how we would promote that logo and that name and that culture. But I believe we'll do the same thing with the names we're coming down to."
Foley said Nighthawks, though not his preferred choice, is still on the table.
"That's still a name, we have it reserved. It's a name we could use," he said. "It's not our preferred name. We have a couple of others that we're working through that are a little bit different, but it's kind of our backup plan. I guess you could say that."