Ahh unless I have the wrong birth census
.So should I change his name from Bernard to bryan,it might be what’s picking up different details,
A census is a count of a population on a specific date. Baptism registers and birth registers are not censuses.
You need to search for both Bernard/Barnard and Bryan/Brian/Brien. 2 of my Irish ancestors were named Honor or Honoria or Hanora in baptism and birth registers and on 1 marriage record. One was Ann and the other Annie in everyday life. Annie married her first husband as Honoria. When she registered his death 10 years later, she gave the name Annie. She married her 2nd husband as Annie and remained Annie for the rest of her life, on censuses, will, death registration, tombstone. 2 of her sons named a daughter Anne after her. The other Ann/Hanora had a son named Austin, a short form of Augustine which was common in Mayo. A baby might have been registered as Austin and baptised as Augustine. There are some other name variants in Ireland which are totally different to each other.