Question: Ranald Og MacDonald was a son of Angus MacDonald, 8th of Dunnyveg, he captured Dunyvaig Castle, in which year?

Context paragraphs:
Archibald MacDonald of Gigha: Archibald MacDonald of Gigha, Gilleashuig Dubh, was a son of Angus MacDonald, 8th of Dunnyveg.  Archibald was granted lands on Gigha for life in a charter in 1576, which were confirmed in 1582 and by the crown in 1598.  Archibald was confined as a hostage for his father and brother in Dumbarton Castle and attempted an escape from the castle in 1607.  He died in 1618.

Ranald MacDonald of Smerby: Ranald MacDonald of Smerby was a son of James MacDonald, 6th of Dunnyveg and Agnes Campbell, daughter of Colin Campbell, 3rd Earl of Argyll.  He was granted Smerby Castle from his father.  He was a hostage for the good behaviour of his family together with his nephew James held by Sir Lachlan Mor Maclean.  He was in charge of the garrison of troops within Loch Gorm Castle and surrendered the castle to Sir John Campbell of Cawdor on 28 January 1615.  Ranald died in 1616, and was buried at Saddell Abbey.

Battle of Bloody Bay: The Battle of Bloody Bay, or Blàr Bàgh na Fala in Scottish Gaelic, was a naval battle fought near Tobermory, Scotland.  It was fought on the coast of Mull two miles north of Tobermory, between John MacDonald of Islay, the Lord of the Isles and chief of Clan Donald; and his son, Angus Og Macdonald.  The precise date of the battle varies in sources, from 1480 to 1483.  After the battle, in which Angus Og Macdonald emerged victorious, the latter seized power from his father, and held it for a decade.  However, Angus's victory would prove pyrrhic.  Many clansmen had died in the battle and nearly half the clan's fleet had been sunk, as a result of which the power of the Lords of the Isles was henceforth greatly diminished.  Angus, last of the independent Lords of the Isles, would himself be murdered ten years later, in 1490.

Baron Macdonald: Baron Macdonald, of Slate in the County of Antrim, is a title in the Peerage of Ireland.  It was created in 1776 for Sir Alexander Macdonald, 9th Baronet, of Sleat.  The Macdonald family of Sleat descends from Uisdean Macdonald (died 1498), also known as Hugh of Sleat, or Hugh Macdonald, who was an illegitimate son of Alexander Macdonald, Earl of Ross.  On 28 May 1625, his great-great-great-great-grandson Donald Gorm Og Macdonald (not to be confused with Donald Gorm, Hugh's great grandson) was created a baronet, of Sleat in the Isle of Skye in the County of Inverness, in the Baronetage of Nova Scotia.  The baronetcy was created with remainder to heirs male whatsoever and with a special clause of precedence which provided that it should have precedency over all former baronets (Sir Robert Gordon excepted).

Alexander Og MacDonald: Alexander Og MacDonald (died 3 October 1613) was a son of Angus MacDonald, 8th of Dunnyveg and Mary, daughter of Hector Og Maclean of Duart.  He had a daughter Margaret to an unknown woman.  Alexander drowned on 3 October 1613 in "Caol Ile" (Sound of Islay).  Margaret, married Hector MacAlister of Ardincross in 1626.

Ranald Og MacDonald: Ranald Og MacDonald was a son of Angus MacDonald, 8th of Dunnyveg.  He captured Dunyvaig Castle in 1614 from the constable Andrew Knox and royal garrison.  Dunyvaig was retaken by his brother Angus Og.

Hugh Bisset: After the defeat of the forces and death of Alexander Og MacDonald, Lord of Islay in 1299 against the forces of Alexander MacDougall, Lord of Argyll, an expedition led by Angus Og MacDonald, John MacSween and Hugh was undertaken against the Lord of Argyll shortly afterwards.  During the early years of the Wars of Scottish Independence, Hugh entered into the service of King Edward I of England.  He led a fleet of ships of the North Channel with John of Argyll during the winter of 1306, however appears to have changed sides supporting Robert de Brus shortly afterwards.  Hugh lost lands in Ireland for his betrayal against Edward I and later King Edward II of England.

Angus Og MacDonald (d.1615): Angus Og MacDonald (died 8 July 1615) was a son of Angus MacDonald, 8th of Dunnyveg and Mary, daughter of Hector Og Maclean of Duart.

Dunyvaig Castle: Dunyvaig Castle, (Scottish Gaelic: "Dùn Naomhaig" , Anglicised "Fort of the galleys", also known as "Dunnyveg") is located on the south side of Islay, in Argyll, Scotland, on the shore of Lagavulin Bay, 4 km 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.

Angus MacDonald, 8th of Dunnyveg: Angus MacDonald, 8th of Dunnyveg (died 21 October 1614) was the Clan Chief of Clan MacDonald of Dunnyveg.

Supporting paragraphs: Ranald Og MacDonald Dunyvaig Castle
Answer: 1614