David de Lindsay of the Byres

David de Lindsay, Lord of Barnweill and Byres (died 1279), was a Scottish knight and crusader. A minor baronial lord, he was the son of David de Lindsay and held lands in East Lothian and South Ayrshire. He became Justiciar of Lothian under Alexander II of Scotland in 1241. This position had been held by his father earlier in the century.

He rose to further national prominence as a supporter of the Comyns during the minority of Alexander III of Scotland, becoming a regent in 1255 and royal Lord Chamberlain of Scotland in 1255 serving until 1257.

He went on the Ninth Crusade with Prince Edward, and died in Egypt, c. 1279.