Theo Treharne-Jones managed to get out of the hotel room where his parents were sleeping before falling into the hotel's swimming pool.
73-year-old John Tossell went for a walk while on holiday in Zakynthos - also known as Zante - on 17 June and has not been seen since.
John Tossell, 73, is said to have gone on a walk to a monastery on 17 June - and his family have not seen or heard from him since.
Refugees and volunteers have spoken to our current affairs programme Y Byd ar Bedwar about the refugee crisis on the Greek Islands.
A family from Llanelli told ITV News their hotel "shook like jelly," when a 6.7 magnitude earthquake struck the Greek island of Kos.