List of English monarchs
House of Blois
Table:
Name
Portrait
Birth
Marriage(s)
Death
Claim
Ref.

Stephen
Stephen of Blois
22 December 1135[c]
–
25 October 1154
(18 years, 308 days)

c. 1096
Blois

Son of Stephen II of Blois
and Adela of Normandy

Matilda of Boulogne
Westminster
1125
6 children

25 October 1154
Dover Castle
Aged about 58

Grandson of William I

Appointment / usurpation

[58]
[60]

From the table that covers 'List of English monarchs' in the 'House of Blois' section, produce a single-sentence summary focused on the highlighted cells and provide it inside the JSON object {"answer": "YOUR ANSWER"}.