• Not the son of William Graham, 1st Earl of Montrose or the husband of Jean Graham
• Not this https://www.catholic-hierarchy.org/bishop/bchiswi.html

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Origins

"I. Sir Edmund Chisholm, who was the fourth son of Robert Chisholme, VII. of Chisholme, in Roxburghshire … He married He married, secondly, Janet, daughter of James Drummond of Coldoch, a younger brother of John, first Lord Drummond, with issue:

William, who afterwards succeeded his eldest brother in the Bishopric of Dunblane, and of whom presently.

Wikipedia Biographical Summary

"William Chisholm (called I in some biographies; c. 1498[1] – 1564), bishop of Dunblane, was the second son of Edmund Chisholm of Cromlix, near Dunblane, a son of Chisholm of that ilk in Roxburghshire, and half-brother of James Chisholm, who was bishop of Dunblane from 1486 to 1527, when he resigned his see, with the consent of Pope Clement VII and King James V, in favour of his nephew William Chisholm (II).

William Chisholm was consecrated bishop at Stirling on 14 April 1527, but James continued to administer the affairs and receive the income of the see until his death in 1534. Chisholm seems to have been a man of immoral character, and a nepotist, for, being an adversary of the Reformation, he alienated nearly all the property of the bishopric of Dunblane to his relations.

Most of it he gave to his nephew, Sir James Chisholm of Cromlix; and large portions also to his illegitimate son, James Chisholm of Glassengall, who married Joan, daughter of Sir John Drummond of Innerpeffray, and to his two illegitimate daughters, who were married respectively to Sir James Stirling of Keir and to John Buchanan of that ilk. His daughter Jean, who married Sir James Stirling of Keir, is said in an old genealogy of the Drummonds, quoted by Fraser in his "Stirlings of Keir", to have been the daughter of the bishop by Lady Jean Grahame, daughter of the Earl of Montrose, and in the same book are contained many grants of land from the bishop to this daughter and her husband.

One of the Lords of the Congregation, the Earl of Arran, looted the Bishop's palace and carried him and his valuables to Stirling Castle on 9 November 1559.

He died on 14 or 15 December 1564 and was succeeded in the bishopric of Dunblane by his nephew, William Chisholm (II) of the family of Cromlix, who had been appointed his coadjutor in 1561."

SOURCE: Wikipedia contributors, 'William Chisholm (I)', Wikipedia, The Free Encyclopedia, 17 February 2013, 17:38 UTC, <http://en.wikipedia.org/w/index.php?title=William_Chisholm_(I)&oldi...> [accessed 21 March 2013]

Other References

• History of the Chisholms, with genealogies of the principal families of the name; Alexander Mackenzie; 1891; page 193]

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William Chisholm, Bishop of Dunblane

From Wikitree:

William was born about 1498, the son of Sir Edmund Chisholm, 1st of Cromlix. and Janet Drummond. He was notorious for transferring the titles of church properties to his relatives and known as the "Robber Bishop." He and Jean Graham were the unmarried parents of Jean Chisholm.[1]

Sources

↑ Balfour Paul: Vol 6, Page 226

Publications:

Balfour Paul, Sir James. The Scots Peerage (David Douglas, Edinburgh, 1904-1914); in 9 Volumes
Wikipedia: William Chisholm (I).
Mackenzie, Alexander. History of the Chisholms: with genealogies of the principal families of the name. Sydney, B.C., The Clan Chisholm Society, 2003, p 198.
Anderson, W. (1867). The Scottish nation ; or the surnames, families, literature, honours, and biographical history of the people of Scotland: By William Anderson (Vol. I). Edinburgh: A. Fullarton &, 44 South Bridge, Edinburgh, p 641