Siward was a medieval Bishop of Rochester

Bishop of Rochester

The Bishop of Rochester is the ordinary of the Church of England Diocese of Rochester in the Province of Canterbury.The diocese covers the west of the county of Kent and is centred in the city of Rochester where the bishop's seat is located at the Cathedral Church of Christ and the Blessed Virgin...

.

Life

Siward was abbot

Abbot

The word abbot, meaning father, is a title given to the head of a monastery in various traditions, including Christianity. The office may also be given as an honorary title to a clergyman who is not actually the head of a monastery...

 of Chertsey Abbey

Chertsey Abbey

Chertsey Abbey, dedicated to St Peter, was a Benedictine monastery located at Chertsey in the English county of Surrey.It was founded by Saint Erkenwald, later Bishop of London, in 666 AD and he became the first abbot. In the 9th century it was sacked by the Danes and refounded from Abingdon Abbey...

, a Benedictine

Benedictine

Benedictine refers to the spirituality and consecrated life in accordance with the Rule of St Benedict, written by Benedict of Nursia in the sixth century for the cenobitic communities he founded in central Italy. The most notable of these is Monte Cassino, the first monastery founded by Benedict...

 abbey in Surrey

Surrey

Surrey is a county in the South East of England and is one of the Home Counties. The county borders Greater London, Kent, East Sussex, West Sussex, Hampshire and Berkshire. The historic county town is Guildford. Surrey County Council sits at Kingston upon Thames, although this has been part of...

 before he was selected for the see of Rochester. He was consecrated in 1058. He died in 1075. His death was commemorated on 30 October, so he probably died on that date in 1075. After the appointment of Lanfranc

Lanfranc

Lanfranc was Archbishop of Canterbury, and a Lombard by birth.-Early life:Lanfranc was born in the early years of the 11th century at Pavia, where later tradition held that his father, Hanbald, held a rank broadly equivalent to magistrate...

 as Archbishop of Canterbury

Archbishop of Canterbury

The Archbishop of Canterbury is the senior bishop and principal leader of the Church of England, the symbolic head of the worldwide Anglican Communion, and the diocesan bishop of the Diocese of Canterbury. In his role as head of the Anglican Communion, the archbishop leads the third largest group...

, the new archbishop found only four canons at Rochester under Siward's authority.