(1728 - 1792) A Scottish architect and interior designer, who was a leader of the first phase of the classical revival in England and Scotland and became one of the most successful and fashionable architects in the country. Partnered with his brother, John.

(1801- 1892) Mathematician and Astronomer Royal. His achievements include work on planetary orbits, measuring the mean density of the Earth, and establishing Greenwich as the location of the prime meridian.
A naval commander before succeeding his childless elder brother to the dukedom in 1847. In 1852 he was appointed First Lord of the Admiralty, with a seat in the cabinet.
(1686-1767) heroine of the 1715 Jacobite uprising when she engineered the escape of her brother, Tom, from Newgate.
(1714–1786) Born Hugh Smithson, changed his name to Percy on marrying Lady Elizabeth Seymour, heiress of the Percy family, which had held the Earldom of Northumberland since before Hotspur.
(1742–1817) An army officer before acceding to the Dukedom in 1766. Participated in the Battles of Lexington and Concord and the Battle of Long Island during the American War of Independence.
(1785-1847) Member of Parliament before succeeding his father as Duke of Northumberland in 1817. Later held the office of Lord-Lieutenant of Ireland when the Catholic Emancipation Act was passed,
(1364 – 1403), nicknamed Hotspur, a knight who fought in several campaigns against the Scots and against the French during the Hundred Years' War.
(1799-1881) was an English architect with a reputation as an expert on medieval buildings, which he applied to restoration of castles and country houses, and new houses and churches.
(1757–1819) Newcastle's leading architect at the start of the 19th century.
The author of "History of the Borough, Castle, and Barony of Alnwick" was born and died in Alnwick. He was a freeman, trained as a linen draper, was appointed postmaster in 1848, and was active in the public life the town.

The first Methodist preacher to visit Alnwick was probably John Trembath, in 1744. Charles Wesley is said to have preached here in 1746. In 1748 John Wesley preached at the Cross, but commented that 'all were moved a little, but none very much'. Alnwick became a regular stopping point on his two-yearly journeys to Scotland.

(c. 1142 – 1214) King of Scots from 1165 to 1214. His long and generally effective reign was marred by unsuccessful attempts to regain control of Northumbria.
Moved to Alnwick in 1854 to work with Salvin on the Castle. Remained for the rest of his life. Committed himself to the life of the town and worked extensively on design of new buildings, restoration and sanitation.