The couple, who met at Australia Zoo, share a love and appreciation for the great outdoors so it makes perfect sense for them to take inspiration from wildlife when choosing a name for their bundle of joy.
If Irwin, who is of course the daughter of late Crocodile Hunter Steve Irwin, chooses an animal themed name for her baby, she will not be the first celebrity to do so.
Nicole Richie and Joel Madden have a son named Sparrow, Zooey Deschanel and Jacob Pechenik named their daughter Elsie Otter while their son's name is Charlie Wolf. Busy Philipps has two daughters named Birdie and Cricket.
Believe it or not, the very Australian baby name Koala even scores itself a mention on popular baby name site Nameberry after Macklemore and wife Tricia Davis used it as the middle name for their second daughter Colette in 2018.
Here are some other wildlife inspired names Irwin and Powell might consider for their short list:
Nothing says Australia like the Great Barrier Reef and our gorgeous underwater ecosystem. It's also a gorgeous name for a little girl.
A fierce animal in the wild, but also an adorable baby name. Zooey Deschanel used it as a middle name for her son Charlie.
Meaning "strong and brave" we can't think of a better name to describe a little Irwin!
Photo: Getty Images
Raven Darkholme is the real name of Mystique, heroine of the X-Men films played by Jennifer Lawrence and, of course, the titular name of Raven Symone's character in That's So Raven.
This striking name is unusual and also a constellation in the Northern Hemisphere's sky.
Reaching the it's height of popularity well over 100 years ago, Birdie is making a comeback as a sweet name for a little girl.
This adorable name could work for both a boy or a girl. It's simple, catchy and a little bit wild.
Is there anything sweeter than a doe-eyed deer?
Though previously thought of as a girl's name, there has been a rise in people naming their sons Sparrow. Nicole Richie and Joel Madden chose it for thier son when he was born in 2009.
As far as bodies of water go, a river is pretty tranquil, and the name has become more popular in recent times, especially amongst celebrity parents.
Another name that could work for a boy or a girl - and a subtle way to honour Bindi's late father, the Crocodile Hunter himself.