What is this tune/song?

I often hear variations of this tune played by the guys from The Ukulele Site. It's a simple G7 and C alternation but it just sounds magical to my ears. I absolutely love it and would often play it myself. Is it from a song or part of some well-known music?

 

[mds725]

It sounds to me like Hi'ilawe.

 

[uketorik]

It sounds to me like Hi'ilawe.

Yes it it! Thanks so much

 

[MarTay6]

It sounds to me like Hi'ilawe.

What an utterly amazing voice he had......