What's in a name? A weight of biological evolution, according to a new British study.

Jack and Ruby have seen a resurgence to once again top the list of Queensland's most popular baby names.

Jack retook the crown in 2012 from Cooper, which saw a three-year reign, while Ruby went back to number one after briefly being overtaken by Sophie in 2011.

Attorney-General Jarrod Bleijie released the top 10 most popular boys and girls names in Queensland for 2012 on Sunday.

Fashion played a part for some parents, with girls named Fedora and Couture. Click for more photos

Most unusual names of 2012

Fashion played a part for some parents, with girls named Fedora and Couture.

"Naming a child is one of the most important things a parent has to do," he said in a statement.

"The names we choose for our children can define them for the rest of their lives, through all the highs and lows."

Mr Bleijie suggested the list could give inspiration to Prince William and his wife Catherine.

"With these results maybe a Princess Ruby or Prince Jack could be joining the royal family soon," he said.

Top 10 most popular baby names in Queensland in 2012:

Boys:

  • Jack (289 babies)
  • Cooper (281 babies)
  • William (258 babies)
  • Noah (240 babies) 
  • Oliver (227 babies)
  • Ethan (212 babies)
  • Lachlan (207 babies)
  • Thomas (200 babies)
  • Liam (187 babies)
  • James (171 babies)

Girls:

  • Ruby (254 babies)
  • Charlotte (249 babies)
  • Sophie (241 babies)
  • Chloe (224 babies)
  • Isabella (205 babies)
  • Amelia (200 babies)
  • Mia (197 babies)
  • Emily (193 babies)
  • Ava (191 babies)
  • Olivia (189 babies)

Source: Department of Justice and Attorney General.

AAP