Before 910 Æthelstan Half King was born to Æthelfrith of Mercia.
Around 915 [his father] Æthelfrith of Mercia died. Possibly 904.
Around 932 Æthelstan Half King (age 22) was appointed Earldorman East Anglia by King Æthelstan I of England (age 38).
In 956 Æthelstan Half King (age 46) died.
[his son] Æthelwald Ealdorman of East Anglia was born to Æthelstan Half King (probably).