Cadell ap Brochfael

{{Short description|King of Powys}}{{More citations needed|date=June 2024}}

{{Use dmy dates|date=April 2022}}

{{Welsh name|Cadell|Cadell}}

{{Infobox royalty

| type = Monarch

| name = Cadell ap Brochfael

| image =

| caption =

| succession = King of Powys

| noble family =

| reign = 773–808

| predecessor = Brochfael ab Elisedd

| successor = Cyngen ap Cadell

| father = Brochfael ab Elisedd

| mother =

| spouse =

| issue = Cyngen ap Cadell Nest ferch Cadell

| birth_date =

| birth_place =

| death_date = c. 808

| death_place =

}}

Cadell ap Brochfael ('Cadell, son of Brochfael'; died c. 808), also known as Cadell Powys, was an 8th- and 9th-century king of Powys.

He was the son of Brochfael ab Elisedd, whom he succeeded to the throne c. 773.{{fact|date=April 2025}}

The Annals of Wales mention his death, and Phillimore's reconstruction dates the entry to AD 808.{{Citation needed|date=June 2024}} His name also was inscribed (as "Cattell"){{Citation needed|date=June 2024}} on the Pillar of Eliseg.{{Cite book |last=Charles-Edwards |first=T. M. |title=Wales and the Britons, 350–1064 |date=2013 |publisher=Oxford University Press |isbn=978-0-19-821731-2 |pages=414–415}}

He was succeeded by his son Cyngen ap Cadell, the last known king of the Cadelling dynasty of Powys.{{Cite book |last=Thornton |first=David E. |title=Oxford Dictionary of National Biography |date=2004 |publisher=Oxford University Press |isbn=0-19-861364-4 |volume=14 |pages=865–866 |chapter=Cyngen ap Cadell}} Some genealogies claim that his daughter Nest became the wife of Merfyn Frych, the king of the neighbouring kingdom of Gwynedd.