
1) Arthurian character 2) Medieval legend
Found on
https://www.crosswordclues.com/clue/vortigern

Vortigern (n; Gwrtheyrn; Wyrtgeorn; Guorthigern; Foirtchern), also spelled Vortiger and Vortigen, was a 5th-century warlord in Britain, a leading ruler among the Britons. His existence is considered likely, though information about him is shrouded in legend. He may have been the `superbus tyrannus` said to have invited Hengist and Horsa to aid h.....
Found on
http://en.wikipedia.org/wiki/Vortigern

also spelled Wyrtgeorn king of the Britons at the time of the arrival of the Saxons under Hengist and Horsa in the 5th century. Though the subject of ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/v/36

English ruler, said by
Bede to have invited the Saxons to Britain to repel the
Picts and Scots, and to have married Row...
Found on
http://www.encyclo.co.uk/local/20688

HMS Vortigern was a British V Class destroyer of 1090 tons displacement launched in 1917 and sunk during the Second World War. She was armed with four 4-inch guns; one 2-pounder pompom anti-aircraft gun; one machine gun; four Lewis guns and five 21-inch torpedo tubes arranged in one triple forward and one double after deck mountings added during mo...
Found on
http://www.probertencyclopaedia.com/browse/RV.HTM
No exact match found.