Un diwrnod braf a heulog oedd hi ym Mharc Cenedlaethol Eryri.

It was a beautiful and sunny day in Snowdonia National Park.

Roedd Rhys yn edrych ymlaen at ailuno â'i deulu yn y picnic blynyddol.

Rhys was looking forward to reuniting with his family at the annual picnic.

Eleri, ei chwaer fach, oedd gyda Rhys yn cerdded trwy'r bryniau gwyrdd, a’r awyr mor las fel llygad y dydd.

Eleri, his little sister, was walking with Rhys through the green hills, and the sky was as blue as the eye of the day.

Wrth groesi bryn, gwelodd Rhys beth oedd yn ymddangos fel criw o'i berthnasau o bell.

While crossing a hill, Rhys saw what seemed like a group of his relatives in the distance.

Roedd yn dal i gerdded tuag atynt yn gyflym gan eu galw, "Helô!

He was quickly walking towards them when they called, "Hello!

Dyma ni!

Here we are!"

"Ond pan gyrhaeddodd, yn lle wynebau cyfarwydd ei ewythrod ac anti, roedd Rhys yn sefyll ymysg praidd o ddefaid!

But upon reaching them, instead of familiar faces of his uncles and aunts, Rhys found himself among a herd of sheep!

Eleri oedd wedi aros ychydig tu ôl yn syllu arno, ei llaw’n gorchuddio ei cheg i rwystro'r chwerthin.

Eleri had been following a little behind, looking at him, her hand covering her mouth to stop herself from laughing.

"Rhys!

"Rhys!"

" gwaeddodd Eleri gyda gwên fawr ar ei hwyneb, "Dyna ddefaid, nid ein cefndryd!

exclaimed Eleri with a big smile on her face, "Those are sheep, not our relatives!"

"Camgymeriad doniol oedd e!

It was a funny mistake!

Roedd Rhys wedi cymysgu ei deulu â'r defaid Cymreig sy'n crwydro'r parc yn rhydd.

Rhys had mistaken his family for the Welsh sheep freely wandering the park.

Yn y pen draw, doedd dim niwed wedi'i wneud.

In the end, no harm had been done.

Chwarddodd Rhys hefyd, gan gyfaddef ei fod e wedi cael ei gamarwain gan y gwlân meddal a siapiau crwn y defaid o'r pellter.

Rhys also chuckled, admitting he had been mistaken by the soft wool and round shapes of the sheep from a distance.

Daeth y gwir deulu at ei gilydd o'r diwedd wrth i'r chwerthin troi'n straeon a rhannu bwyd ar lan y llyn.

The true family finally came together as the laughter turned into stories and sharing food by the lake.

Roedd y picnic yn llawn cariad a chwerthin, a'r stori am gamgymeriad Rhys yn troi'n chwedl deuluol fyddai'n para am flynyddoedd.

The picnic was full of love and laughter, and the story of Rhys's mistake turned into a family tale that would last for years.

Ddiwedd hapus a doniol i ddiwrnod anhygoel yng nghanol harddwch naturiol Eryri.

A happy and humorous end to an incredible day in the midst of Snowdonia's natural beauty.

Ac roedd gwers i'w dysgu gan Rhys a phawb - peidiwch byth â rhoi eich ffydd ym mheth rydych chi'n ei weld o bell!

And there was a lesson to be learned from Rhys and everyone - never put your faith in what you see from afar!