Edward was the son of Richard Guilford and Anne De Pympe.
Richard was the son of John Guilford and Alice Waller.
Other children of Richard Guilford and Anne De Pympe were:
Philippa Guilford (born about 1480 Of Oxford, Eng.)
Maria Guilford (born in 1487 Oxford, Eng.)
Elizabeth Guilford (born about 1490 Guildford, Surrey, England)
Fredeswith Guilford (born about 1480 Oxford, Eng.)
Edward Guilford married Eleanor West, and was the father of Jane Guilford who married John Dudley, 1st Duke of Northumberland. By not having a son as heir, Edward caused considerable strife with the family legacy when Jane inherited Haldon Manor rather than his nephew, John Guildford, Member_of_Parliament for Gatton, who was (arguably) instead intended to inherit with no nearer male heir.
As he was without a will and without male issue, the Guilford estate was to be the cause of a dispute between Dudley (claiming through Jane Guilford, Edward's daughter and only child, whom he had married in 1520) and Guilford's nephew.
Under Edward VI Henry had appointed sixteen regents to govern the kingdom during his son's minority, John Dudley being amongst them, but Edward's uncle the Duke of Somerset had disregarded this fact and elected himself sole Protector just before the coronation.
When Edward was dying, he and Dudley concocted a document which barred both Elizabeth and Mary (the remaining children of King Henry VIII of England) from the throne, in favour of Lady Jane Grey (who married Dudley's youngest son, Guilford Dudley).