This name was most notably borne by saint Wiro of Roermond (8th century AD), who was also known as Wera or Wiro of Utrecht. He was an Anglo-Saxon (though some say Irish) missionary who preached in what is now the province of Limburg in the Netherlands.
In the epic poem Beowulf, Wiglaf son of Weohstan (weoh, with guttural H, is a variant pronunciation of wig) is a loyal thane and distant relative who succeeds Beowulf as king of the Geats.
Wiglaf was also the name of a king of Mercia in the early 9th Century. His son was Wigmund, and his grandson Wigstan.
A modern bearer of the name is the German satirist Wiglaf Droste.
Unrelated, this was also a variant of Wat, used as a medieval short form of Walter.
According to Bede's Ecclesiastical History of the English People, Oisc's given name was Orric. Bede indicates that he was the son of Hengest and travelled to Britain with him, with the permission of the British king Vortigern. He was the father of Octa, who succeeded him. His descendants called themselves 'Oiscingas' after him.
Mūl was an Anglo-Saxon ruler of the Kingdom of Kent in England.
Known bearers of this name include Cissa of Sussex (son of the 5th-century South Saxon king Ælle of Sussex) and the 8th-century saint Cissa of Crowland.
Shows up in history as the name of a Saxon Earl, who gave his name to local towns.