My great grandfather was born near Pontypridd in September 1899. His name was William Henry Jones

The problem I have is, there are 3 William Henry Jones's whose births were registered at this time. I have no idea who his mother is, and all I know about his father is he was called John Jones.

Short of purchasing all 3 birth certificates and finding out if John fathered one of these Williams, what is the best thing to do?