"Like the animal," Deschanel told People at the premiere of "Rock the Kasbah. "Sea otter," added Pechenik.
"We just really liked the name Elsie and then we both love otters, they’re very sweet and they’re also smart," said Deschanel on NBC News' "Today" show Tuesday morning. "They use tools…they hold hands while they sleep, there’s so many amazing things about otters. They’re wonderful animals."
Elsie Otter is the first child for the pair, who secretly tied the knot in June.
The Monday night premiere was Deschanel's first red carpet appearance since giving birth in July. She looked amazing, rocking a sparkly black Lela Rose dress.
When Deschanel was pregnant, she told Cosmopolitan that she wouldn't be in any rush to get into a bikini after giving birth.
"Haven’t we all seen those pictures of a sexy new mom in a bikini after one month?" said Deschanel. "I will not be that person. I’ve always gone my own course and never been someone who had the need to be super skinny. I like a healthy look."
And while Deschanel is busy hanging out with Elsie Otter on maternity leave, Megan Fox will fill in for her on "New Girl."
Also on HuffPost:
For a constant stream of entertainment news and discussion, follow HuffPost Entertainment on Viber.