He was born in North Ayrshire, the younger son of Adam Montgomery, 5th Laird of Braidstane, and brother of Hugh Montgomery, 1st Viscount Montgomery, who used his influence on George's behalf. Their mother Margaret Hessilhead was a cousin. After James I had made him Dean of Norwich in 1603, he was appointed the first Protestant Bishop of Raphoe, in 1605. There he began the construction of The Cathedral Church of St. Eunan. At the same time he was made Bishop of Clogher and Bishop of Derry; and in 1607 lobbied Lord Salisbury for the establishment of free schools in Ulster. In 1608 when O'Doherty's Rebellion broke out, the settlement of Derry was captured and burnt by the rebels led by Sir Cahir O'Doherty. Although Montgomery and O'Doherty had been on good terms before the rising,, the rebels burnt the Bishop's house and his library of two thousand books because of their supposedly heretical content. The Bishop's wife and sister were taken as hostages by the rebels, but were eventually freed by Crown forces. From 1609 he assisted in the plantation of Scots in western Ulster. From 1610 he was Bishop of Meath, retaining the Norwich deanery to 1614, and the Raphoe bishopric for the rest of his life. Montgomery was also rector of Chedzoy. After his death in London in 1620/21 his body was taken to Ireland and buried at Ardbraccan church.
Marriage and children
He married twice: mural monument in Washfield Church, Devon, erected by Montgomery in memory of his mother-in-law Alice Fry. His arms are shown on the escutcheon at sinister, impaling Steyning: Argent, a bat displayed sable.
Firstly to Susan Steyning, the eldest daughter of Phillip Steyning, lord of the manor of Holnicote in Somerset, by his wife Alice Fry, a daughter of William Fry, lord of the manor of Yarty in Devon. Montgomery erected a monumental brass tablet in Washfield Church in Devon to his mother-in-law Alice Fry, on which are engraved his arms impaling Steyning. It comprises a lengthy rhyming verse on the lady's good moral character, composed by Montgomery. Susan Steyning's younger sister Margaret Steyning married John Willoughby of Payhembury in Devon, with whom Montgomery frequently corresponded. The correspondence was preserved by Willoughby's granddaughter Mary Willoughby, the wife of George Trevelyan, lord of the manor of Nettlecombe in Somerset, which collection is now known as the Trevelyan Papers. These provide an important source for the biography of Montgomery. By his wife Susan Steyning he had children as follows:
Secondly he married Elizabeth Brabazon, daughter of Edward Brabazon, 1st Baron Ardee and Mary Smythe, and sister of William Brabazon, 1st Earl of Meath. After his death she made two further marriages: to Sir John Brereton, Serjeant-at-law, and finally to Sir John Bramston, the Lord Chief Justice. This last marriage was the revival of a longstanding attachment: her father had forbidden them to marry, but her brother Lord Meath made no objection. She died in 1647. Her stepchildren remembered her fondly as a good wife and kindly stepmother, but not as someone for whom they would expect their father to cherish a long romantic attachment, being short, fat, red-faced and badly dressed.
Character
He was praised in his time as "no lazy bishop nor idle patriot" and was called the "darling and chief advocate of the Church of Ireland". He was also noted for his loyalty to his brother Lord Montgomery, his "best and closest friend".
