I have an Oliver. He is 9.
In his yeargroup at school (large school so 90 children per year) he has never ever come across another Oliver. In fact, in the whole school of 300 children there are only 2 Olivers.
In all his out of school drama clubs, Beavers then Cubs, swimming lessons etc, we have never come across another Oliver.
We come across far more boys called Luke (at ds's school there are 12 out of 300 children)
And as for Jayden, very artificial, a bit rough and a bit 'chavvy' (sorry, not sure how else to describe it)