Hi,
Could this be your man? He's a couple of years older than you would expect from the other entries:
Ref: RG9/4339 Folio 96 Page 24
William PHILLIPS, Head, 45, Miner, Copper
Wineffrit WILLIAMS, Wife, 51
Margaret WILLIAMS, Dau, 20
Thomas PHILLIPS, Son, 16
Shara WILLIAMS, Dau, 12
John PHILLIPS, Son, 10
William PHILLIPS, Son, 7
Catherine WILLIAMS, Dau, 1
All born Llanberis
Even if this is not your ancestor, the entry is interesting in that the wife appears to have kept her maiden name (I've seen this before in Scottish census records) and whilst the sons have taken their Father's surname, the daughters have taken their Mother's!
Regards,
Al