Jack remains the most popular first forename for baby boys, for a seventh
consecutive year. James is again in second place; Lewis and Oliver remain third and fourth respectively.

Emily has risen from third to replace Sophie as the most popular first forename for baby girls. Sophie (which had been the top girls’ name for the previous nine years) falls to second place, and Olivia (which had been second) is now third. Isla remains in fourth place.
 
In total, 3,220 different boys’ first forenames and 4,208 different girls’ first
forenames were registered in the first eleven months of the year.

 Jack was the first forename of only 2.0 per cent of the boys, and Emily was the first forename of just 2.1 per cent of the girls.

The top 50 boys’ names accounted for 41 per cent of all boys’ first forenames registered, and the top 50 girls' names accounted for 39 per cent of the girls' registrations.

Jack was the most popular first name given to baby boys in Northern Ireland in 2014. Jack has been the most popular for boys consecutively since 2003. James remained the second most popular boy’s name in 2014 for the fourth year running, while Daniel climbed from fifth in 2013 to third in 2014. Thomas was a new entry into the boy’s top 10 in 2014, replacing Matthew.

Emily was the most popular girl’s name registered in 2014. Grace fell from joint first place in 2013 to second place, while Sophie remained in third place in 2014. Olivia and Eva increased in popularity to enter the girl’s top 10, replacing Aoife and Jessica. 

More detail here:  Baby Names Bulletin 2014