Can you provide any information?
Founded: c.1906
Disbanded: c.1907
Home ground: Buccleuch Park
Notes:
Buccleuch Thistle played rugby union against Hawick Linden in January 1907. Probably a Hawick side, taking its name from Buccleuch Park; the former ground of Hawick and Wilton.
https://www.britishnewspaperarchive.co.uk/viewer/bl/0000469/19070117/020/0004
There was a later Edinburgh Buccleuch Thistle but this was an association football side.