STA provides the following info about the Brown tartan:


Name of Tartan: Brown
ITI number: 432
Category: Clan/Family
Designer / Source: Scott Adie Catalogue
Date: pre 1905

Notes:
A Scott-Adie (London) catalogue of the early 1900's showed a tie in this 'Brown' tartan. John Brown, Queen Victoria's Highland servant usually wore a tweed kilt claiming that although of Highland origin, he had no claim to any specific tartan. This has also been reported as being sold as Grady (see # 5083 and 1141).

Cordially,
David