Jack and Aoife replaced Conor and Chloe as the most popular babies' names registered last year, according to a Central Statistics Office survey published yesterday.
There were 846 boys named Jack (3.3 per cent) and 633 girls named Aoife (2.7 per cent).
Jack was a popular choice across the State and top of the list in five regions. The three exceptions were the Border region, where Conor remained the most popular, and Dublin and the south west where Sean was most popular for the third year in a row.
While Aoife was the most popular girls' name overall, it came top of the list in only one region: the mid-east. Chloe topped the name charts in the south-east, sharing the honours there with Rebecca.
Ciara was the most popular name in the midlands, west and south-west. In Dublin and the mid-west the most popular girls' name was Sarah and in the Border region it was Niamh.
The top 20 boys' names were: Jack, Sean, Conor, Adam, James, Cian, David, Luke, Michael, Dylan, Daniel, Aaron, Shane, John, Eoin, Patrick, Ryan, Mark, Thomas and Jordan.
The top 20 girls' names were: Aoife, Sarah, Ciara, Emma, Chloe, Niamh, Rebecca, Amy, Lauren, Megan, Rachel, Katie, Laura, Leah, Hannah, Shauna, Sophie, Kate, Emily and Nicole.
There were three new entries in the top 100 for boys: Josh, Kian and Dara, with the highest of these Josh at number 89.
In the girls' top 100 there were seven new entries: Amber, Zara, Cara, Charlotte, Lara, Orlaith and Taylor. The highest placed of these was Amber at number 94.