I know of two Petals born in 2009. One belongs to celebrity chef Jamie Oliver, and the other belongs to Renée Soeterik and Boris Milinkovich of Toronto.
How did the latter Petal get her name? Well, Renee was taking a bath, Boris was brushing his teeth, and they were discussing baby names.
A vase of beautiful mixed flowers, from Boris – sent for no particular reason – sat on a ledge near Renée’s feet. A petal fell on her toe; she said “Petal.”
After that, the couple “didn’t think about any other names.”
Their daughter, Petal Branka, was born in June. (Her middle name honors Boris’ dad, Branko, who passed away several years ago.)
Petal’s older siblings are named Nikita, Indiana (“after Indiana Jones”), and Liam.
Source: Rushowy, Kristin. “Baby name: A winter’s tale turns to a pretty, perfect Petal.” Toronto Star 26 Sept. 2009.