"Both names have been in the top 100 over the past decade, but while they're a popular baby name, they have really dropped," Ashley Fell, social researcher of Australia's Top Baby Names 2021 report, said.
She told news.com.au the names were particularly big in the '80s and '90s, but parents of the Alpha generation (2010 to 2020) are looking for more unique, diverse and robust names.
"In today's digitally connected world, a name is a lot more than what a teacher calls you – a name is a social media handle, a brand, a web domain, it may be taking it to extremes but that's the reality of this digital world we live in.
"Parents of Generation Alpha don't want a super generic and common name that's why we are seeing more variety enter the top 100."
She said for girls you're seeing more of a trend in botanical names like Willow, Ivy, Violet and Daisy, and even colours such as Ruby and Scarlett.
While for boys there's been a trend in nicknames like Jack instead of Jackson.
Baby boys and girls name on the decline
Other boys' names that have suffered dramatic declines include Matthew (currently 75th place), Luke (81st), Riley (47th) and Daniel (58th) – while for the girls it's Maddison (82nd place), Lara (88th), Summer (71st) and Claire (90th).
However, there's still a lot of Aussie parents who love traditional names, particularly with a royal connection, such as Charlotte which has been crowned the number one name for eight out of the last 10 years.
While Charlotte maintains her reign, Amelia has now eclipsed the name Olivia for the second most popular girls' name.
Although it's in a slightly different order, the top 10 girls' names have remained mostly unchanged in the past year, except for Matilda replacing the name Harper.
Oliver, the name given to over 2000 Generation Alpha baby boys has also been consistently popular over the last decade, having enjoyed an uninterrupted eight years at the top spot since overtaking Jack in 2013.
In the last year, Elijah has made an entrance to the top 10 boys names, at the expense of the name James (which dropped from 10th to 15th).
Fell, co-author of Generation Alpha, said one of the most interesting parts of her analysis was discovering the "ie"trend among girls' names (Millie, 64th, Billie, 52nd, Sadie, 58th) and names ending in "o" for the boys such as Arlo (33rd) and Hugo (34th).
"Among these new, emerging names we see the trends of girls' names ending in a vowel or vowel sound, and botanic influences and colours," Fell said.