Kayla Itsines reveals the meaning behind her daughter's name

Fitness icon Kayla Itsines welcomed her first child just two weeks ago, celebrating the arrival of little Arna Leia Pearce with fiancé Tobias Pearce.

The Adelaide personal trainer documented her pregnancy on Instagram, sharing her journey with the 11.5 million fans who followed her as she kept up her workouts until the last days of her pregnancy.

Now Itsines has taken to the social media platform to share the inspiration behind her daughter's uniquely beautiful name.

Posting a touching photo of herself and baby Arna surrounded by family on Mother's Day, Itsines wrote that she wanted her daughter's name to pay tribute to her Greek heritage.

"We wanted to choose a name that was somewhat Greek and traditional by passing on the names of my family through to the next generation," she wrote in the caption.

"Our daughter Arna Leia is named after my incredible mother, Anna and hilarious sister, Leah."

She went on to explain that Anna is spelled 'Avva' in Greek, so she and Tobi chose 'Arna' for their daughter as it was the closest spelling to the Greek pronunciation.

It was only later that they found out Arna also means 'strength' in some cultures, something Itsines called "so beautiful!"

They also took the Greek spelling of Leah for their baby girl, Itsines explaining; "We chose these names to preserve my family’s proud Greek heritage."

She also took the opportunity to thank her fans for all their well wishes since Arna's birth, as well as sharing a sweet Mother's Day message.

"How lucky am I on my very first #MothersDay to be surrounded with these incredible women and blessed with my new baby girl," she wrote.

"Family has always been SO important to me and the last few weeks have only reinforced this. The support of the women in my family has been just amazing."