What does the welsh three feathers symbolize?

Those are the Prince of Wales's feathers. Their origins have nothing to do with Wales in particular or with the native Welsh princes, the last of whom (Llywellyn ein Llyw Olaf) was killed in 1282 by Edward I of England. read more

The three feathers came into use with Edward I’s great-grandson Edward, the Black Prince (1330–1376), father of Richard II of England. He started using it at his wedding, and probably inherited it from his mother, Philippa of Hainault. There’s lots more information in the relevant Wikipedia articles. read more

The Prince of Wales's feathers is the heraldic badge of the Prince of Wales. It consists of three white ostrich feathers emerging from a gold coronet. A ribbon below the coronet bears the motto Ich dien. As well as being used in royal heraldry, the badge is sometimes used to symbolise Wales, particularly in Welsh rugby union and Welsh regiments of the British Army. read more

The Welsh national flag. Welsh Flag. It took until 1959 for the Welsh national flag to be officially unfurled for the first time. The significance of the dragon in Welsh culture is believed to date back to Arthurian legend when Merlin had a vision of a red dragon (representing native Britons) fighting a white dragon (the Saxon invaders). read more