They welcomed their second child, a son, last month but are still yet to confirm his name.
But now it seems a well-meaning friend of Jesinta and Buddy Franklin's has accidentally let slip the stylish moniker on social media.
Underneath a black-and-white snap of proud dad Buddy holding his newborn son, shared on March 24 to announce his arrival, the Sydney Swans superstar's good friend and fashion director Justin O'Shea commented: "Rocky", alongside a slew of hand-clapping emojis and a black love-heart.
The trendy title Rocky, which is of Italian descent and means "rest", certainly suits the stylish family, who also have a one-year-old daughter called Tullulah.
Smitten new mother-of-two Jesinta has been keeping fans up to date as the family settle into life with two young babies.
Last week, she shared a touching photo of Buddy kissing his kids goodbye before he headed off to play an AFL match.
"Game day prep looks a little different in the Franklin household these days and we wouldn't have it any other way We love you @buddy_franklin23 . Great win today @sydneyswans," she penned next to the snap.
Meanwhile this week she posted a photo of her son's feet and simply mused: "So in love."
The 29-year-old model confirmed her second pregnancy in October last year during an Instagram live session with Vida Glow founder Anna Lahey.
"It was a very big surprise for us. Tullulah will be getting a sibling at the end of March next year so she will have just turned one," she explained at the time.
''I'll have a 13-month and a newborn, which was very daunting at first."
Despite taking four years to fall pregnant with Tullulah, Jesinta admitted the second time around was much easier with the couple finding out they were expecting just a week after Buddy travelled up to Queensland to be in the AFL hub.
"It was very hard to conceive the first time with Tullulah, and for this [pregnancy] to be such an unplanned surprise is a blessing," she said.
"I had the moment that I wish for with Tullulah, where you pee on a stick and it's such a surprise and it's very exciting," she added, alluding to her past fertility struggles.
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Australian Women's WeeklyToday 11:36am