| Honorific-Prefix: | The Right Honourable |
| The Lord Reay | |
| Office1: | Member of the House of Lords |
| Status1: | Lord Temporal |
| Term Label1: | as an elected hereditary peer |
| Term Start1: | 28 January 2019 |
| 1Blankname1: | By-election |
| 1Namedata1: | 28 January 2019 |
| Predecessor1: | The 7th Baron Skelmersdale |
| Birth Name: | Aeneas Simon Mackay |
| Birth Date: | 20 March 1965 |
| Party: | Conservative |
| Education: | Westminster School |
| Alma Mater: | Brown University |
Aeneas Simon Mackay[1] , 15th Lord Reay, Baron Mackay (pronounced "Ray"; born 20 March 1965), a Scottish lord and Dutch nobleman, is a British corporate financier who is also hereditary Clan Chief of Clan Mackay. [2] In the Netherlands he is Lord of Ophemert and Zennewijnen, with castle Ophemert.[3] [4]
Educated at Westminster School and Brown University, Lord Reay was a founding partner of the corporate finance firm Montrose Partners.[5]
Lord Reay was admitted to the House of Lords in January 2019, after winning a hereditary peers' by-election.[6] [7] He sits as a Conservative member of the House, and is a member of Lloyd's.[8]
In 2023 the Clan Mackay inaugurated Aeneas Mackay as their chief at a ceremony at the Farr Stone, in north Sutherland, and in the presence of representatives from Clan-Mackay societies from Canada, the U.S.A, Germany and Scotland. The ceremony involved a religious blessing; readings of poetry and ancient documents; a recitation of the chief’s lineage; and the presentation to the chief of a dirk, staff and seal. The chief's seanchaidh lead the ceremony, which included the participation of the Lord-Lieutenant of Sutherland and the High Chief of Clan Donald.[9]
The then Master of Reay married to Mia Ruulio from Finland, elder daughter of Markus Ruulio, in 2010.[10] Lord and Lady Reay live in Chelsea SW3 and Whittington Hall, and have three children:[11]