Bishop Hædde was born at Headingley, probably.
Bede. 673. Eleutherius was the fourth bishop of the West Saxons; for Birinus was the first, Agilbert the second, and Wine the third. When Coinwalch, in whose reign the said Eleutherius was made bishop, died, his under-rulers took upon them the kingdom of the people, and dividing it among themselves, held it ten years; and during their rule he died, and Heddi succeeded him in the bishopric, having been consecrated by Theodore (age 71), in the city of London; during whose prelacy, Cadwalla (age 14), having subdued and removed those rulers, took upon him the government. When he had reigned two years, and whilst the same bishop still governed the church, he quitted his sovereignty for the love of the heavenly kingdom, and, going away to Rome, ended his days there, as shall be said more fully hereafter.
Around 676 Bishop Hædde was appointed Bishop of Winchester.
Bede. 705. How the South Saxons received Eadbert and Eolla and the West Saxons Daniel and Aldhelm for their bishops; and of the writings of the same Aldhelm. [705 a.d.]
In the year of our Lord 705, Aldfrid, king of the Northumbrians, died before the end of the twentieth year of his reign. His son Osred (age 8), a boy about eight years of age, succeeding him in the throne, reigned eleven years. In the beginning of his reign, Haedde, bishop of the West Saxons, departed to the heavenly life; for he was a good man and a just, and his life and doctrine as a bishop were guided rather by his innate love of virtue, than by what he had gained from books. The most reverend bishop, Pechthelm, of whom we shall speak hereafter in the proper place, and who while still deacon or monk was for a long time with his successor Aldhelm (age 66), was wont to relate that many miracles of healing have been wrought in the place where he died, through the merit of his sanctity; and that the men of that province used to carry the dust thence for the sick, and put it into water, and the drinking thereof, or sprinkling with it, brought health to many sick men and beasts; so that the holy dust being frequently carried away, a great hole was made there.
Upon his death, the bishopric of that province was divided into two dioceses. One of them was given to Daniel, which he governs to this day; the other to Aldhelm (age 66), wherein he presided most vigorously four years; both of them were fully instructed, as well in matters touching the Church as in the knowledge of the Scriptures. Aldhelm (age 66), when he was as yet only a priest and abbot of the monastery which is called the city of Maildufus [Map], by order of a synod of his own nation, wrote a notable book against the error of the Britons, in not celebrating Easter at the due time, and in doing divers other things contrary to the purity of doctrine and the peace of the church; and through the reading of this book many of the Britons, who were subject to the West Saxons, were led by him to adopt the Catholic celebration of our Lord's Paschal Feast. He likewise wrote a famous book on Virginity, which, after the example of Sedulius, he composed in twofold form, in hexameters and in prose. He wrote some other books, being a man most instructed in all respects, for he had a polished style, and was, as I have said, of marvellous learning both in liberal and ecclesiastical studies. On his death, Forthere was made bishop in his stead, and is living at this time, being likewise a man very learned in the Holy Scriptures.
Whilst they administered the bishopric, it was determined by a synodal decree, that the province of the South Saxons, which till that time belonged to the diocese of the city of Winchester, where Daniel then presided, should itself have an episcopal see, and a bishop of its own. Eadbert, at that time abbot of the monastery [Map] of Bishop Wilfrid, of blessed memory, called Selaeseu [Map], was consecrated their first bishop. On his death, Eolla succeeded to the office of bishop. He also died some years ago, and the bishopric has been vacant to this day.
Around 07 Jul 705 Bishop Hædde died. Some sources suggest 703.