William Gordon, 2nd Earl of Aberdeen (1679 - 30 March 1745), known between c. 1691 and 1720 as Lord Haddo, was a Scottish landowner and Tory politician who sat in the British House of Commons briefly from 1708 to 1709 when he was declared ineligible. He showed some Jacobite sympathies, but took no part in the rebellions.
Gordon was baptized on 22 December 1679, the fourth but eldest surviving son of the George Gordon, 1st Earl of Aberdeen, and hs wife Anne Lockhart, daughter of George Lockhart of Torbreck, Sutherland. After the death of his elder brother in 1691, he acquired the courtesy title of Lord Haddo. By about 1705, he had married Lady Mary Melville, the only daughter of the 5th Earl of Leven.
Lord Haddo became a member of the Scottish Privy Council in 1704. After the Acts of Union 1707, the position of Privy councillor was abolished, but he was returned as Member of Parliament for Aberdeenshire at the 1708 British general election. As the eldest son of a peer, however, he was declared ineligible and was replaced by Sir Alexander Cumming, 1st Baronet a year later. His wife Mary died in 1710 giving birth to their second child. After the change of administration in 1710, he applied for a place and was granted an unpaid role as a Scottish Commissioner of chamberlainry and trade in 1711. He lost the post on the Hanoverian succession in 1714. AT the 1715 Jacobite rebellion he retired to Edinburgh and took no part.
In about 1716, Lord Haddo married, as his second wife, Lady Susan Murray, daughter of the 1st Duke of Atholl. In 1718 he was Commissioner for visitation at St Andrews University. He succeeded to his father's titles as Earl of Aberdeen in 1720. In 1721, he was chosen as a representative peer for the House of Lords. His second wife also died giving birth to their last child and later he married Lady Anne Gordon, daughter of the 2nd Duke of Gordon.  In 1732 he completed Haddo House, near Tarves in Aberdeenshire which was designed by William Adam.
Lord Aberdeen died at Edinburgh on 30 March 1745. He had acquired the estates of Ballogie, Boddam, Crichie, Fedderat, Fyvie, Ruthven and Tarland. He was succeeded by his eldest son, George. His family took no part in the Jacobite rising.
By his first wife Mary, he had two daughters,
By his second wife Susan he had four children,
By his third wife Anne, he had six children,
|Parliament of Great Britain|
| Member of Parliament for Aberdeenshire
Sir Alexander Cumming, Bt
|Peerage of Scotland|
| Earl of Aberdeen