Lady Agnes Campbell was the daughter of Colin Campbell, 3rd Earl of Argyll

Colin Campbell, 3rd Earl of Argyll

Colin Campbell, 3rd Earl of Argyll was a Scottish nobleman and soldier. He was the son of Archibald Campbell, 2nd Earl of Argyll and Elizabeth Stuart, daughter of John Stewart, 1st Earl of Lennox. In 1506/07 he married Lady Jean Gordon, the eldest daughter of Alexander Gordon, 3rd Earl of Huntly...

 and his wife Lady Jean Gordon.
She was probably born at Inveraray Castle

Inveraray Castle

Inveraray Castle is an estate house near Inveraray in Argyll in western Scotland.It is the seat of the Duke of Argyll and a Category A listed building.-Ghosts:...

 which was the Campbell Family seat.
Her sister, Elizabeth, married James Stewart, 1st Earl of Moray

James Stewart, 1st Earl of Moray (1501 creation)

James Stewart, Earl of Moray was the illegitimate son of James IV of Scotland and his mistress Janet Kennedy. He was created Earl of Moray in 1501, and was young enough to avoid fighting at the disastrous Battle of Flodden Field in 1513. He went on to have a varied relationship with his...

. James was an illegitimate son of King James IV of Scotland

James IV of Scotland

James IV was King of Scots from 11 June 1488 to his death. He is generally regarded as the most successful of the Stewart monarchs of Scotland, but his reign ended with the disastrous defeat at the Battle of Flodden Field, where he became the last monarch from not only Scotland, but also from all...

.

Agnes married James MacDonald

James MacDonald, 6th of Dunnyveg

James Mac Domhnaill or MacDonald in Scotland, 6th of Dunnyveg , a Scoto-Irish chieftain, who was the son of Alexander MacDonald, lord of Islay and Kintyre , and Catherine MacDonald, daughter of the Lord of Ardnamurchan....

 of Dunyvaig

Dunyvaig Castle

Dunyvaig Castle, is located on the south side of Islay, on the shore of Lagavulin Bay, from Port Ellen. The castle was once a naval base of the Lord of the Isles, chiefs of Clan Donald. It was held by the chiefs of the Clan MacDonald of Dunnyveg....

 and the Glens

Glens of Antrim

The Glens of Antrim , known locally as simply The Glens, is a region of County Antrim, Northern Ireland. It comprises nine glens , that radiate from the Antrim Plateau to the coast. The Glens are an area of outstanding natural beauty and are a major tourist attraction in north Antrim...

 in 1545, forming an alliance with the MacDonald

Clan Donald

Clan Donald is one of the largest Scottish clans. There are numerous branches to the clan. Several of these have chiefs recognised by the Lord Lyon King of Arms; these are: Clan Macdonald of Sleat, Clan Macdonald of Clanranald, Clan MacDonell of Glengarry, Clan MacDonald of Keppoch, and Clan...

s. They had a daughter named Fionnghuala, or more famously known as Ineen Dubh

Ineen Dubh

Iníon Dubh, Queen of Tyrconnell , also spelt Inghean Dubh and sometimes Anglicised as Ineen Dubh or Ineen Duv, is the name by which Fionnuala Nic Dhomhnaill , daughter of James MacDonnell and Agnes Campbell, was best known. The name literally means Dark Daughter in the Irish language...

. Fionnghuala married Aodh Mac Maghnusa. James died in 1565 while he was being held prisoner by the Irish chieftain Shane O'Neill

Shane O'Neill

Seán Ó Néill, anglicised Shane O'Neill , nicknamed 'Seán an díomais', was an Irish king of the O'Neill dynasty of Ulster in the mid 16th century. Shane O'Neill's career was marked by his ambition to be The Ó Néill Mór - Sovereign of the dominant Ó Néill Mór family of Tyrone... and thus head...

. Shane at that time had been supporting the English.

In 1569 Agnes went to Ireland to marry Turlough Luineach O'Neill

Turlough Luineach O'Neill

Toirdhealbhach Luineach Mac Néill Chonnalaigh Ó Néill , the earl of the Clan-Connell, was inaugurated as the King of Tyrone, upon Shane O’Neill’s death...

 who had replaced Shane O'Neill as the Chieftain of the O'Neill

O'Neill dynasty

The O'Neill dynasty is a group of families that have held prominent positions and titles throughout European history. The O'Neills take their name from Niall Glúndub, an early 10th century High King of Ireland from the Cenél nEógain...

's in Ulster

Ulster

Ulster is one of the four provinces of Ireland, located in the north of the island. In ancient Ireland, it was one of the fifths ruled by a "king of over-kings" . Following the Norman invasion of Ireland, the ancient kingdoms were shired into a number of counties for administrative and judicial...

. She took with her a dowry of 1,200 Highland troops. Gaelic tradition allowed her to lead these troops herself. She led them against occupying English forces and proved herself to be a formidable leader. She helped mobilize Scottish support for the Irish and was fluent in English and Latin - which greatly impressed the English.