Paz de la Huerta may have a hard time living with her first name – which means “peace” in Spanish – after her run-in with model and former reality star Samantha Swetra early Sunday morning.

Eyewitnesses tell us de la Huerta put the de la hurt-a on Swetra at the Top of the Standard nightclub after the model – who was a cast member of MTV’s “The City” – made a joke about the “Boardwalk Empire” actress’ sobriety.

One insider says de la Huerta, who plays Nucky Thompson‘s hot-tempered girlfriend Lucy Danziger in the HBO series, approached Swetra’s table “after 3 a.m.” where she was with a group of friends that included Lindsay Lohan (who was staying at the hotel that night).

Swetra and de la Huerta had not met before Sunday, a second source tells us, but that didn’t stop the NYC-born actress from flirting with one of Swetra’s male pals.

That’s when, our first source adds, de la Huerta suddenly lost her footing and went crashing into an adjacent table.

After taking in the unexpected pratfall – which, our source adds, resulted in one of de la Huerta’s breasts “hanging out of her dress”- an amused Swetra yelled out “triple axel!”

The gibe sent de la Huerta into a rage and she threw a drink glass at Swetra’s leg and took a swing at the model’s face, the source says.

De la Huerta’s aim is apparently as good as her acting on “Boardwalk Empire.” According to our source, the actress’ fist connected squarely with Swetra’s lips and nose.

The glass, which shattered, also did some damage. “Blood was dripping down [Swetra’s] leg,” the source tells us. “Lindsay was pulling shards of glass off of it.”

The source tells us de la Huerta was escorted out of the Meatpacking District club “by the arm” following the incident.

Swetra and Lohan, both looking “horrified,” soon followed, presumably to return to LiLo’s room in a separate part of the hotel.

Things have been looking darker for Swetra since her encounter with Paz de la Horror – literally.

Sources who saw the 26-year-old former Bergdorf Goodman buyer at an event at Kenneth Cole Productions on W. 50th St. say Swetra has facial bruises and a swollen lip.

They add that she expressed concern about how her injuries might have affected a Singer22 photo shoot she was in yesterday. When we reached Swetra, she declined comment except to say: “I am pressing charges.”

A spokeswoman for de la Huerta did not respond to us by deadline.

BY GATECRASHER