Other branches of the Alexander family that split off from the main lineage in Menstrie settled in Paisley, Renfrewshire, Scotland. One was known as the Alexanders of Blackhouse and Boghall, while another was called the Alexanders of Ballochmyle. The coats of arms for both families closely resemble the arms for the Earls of Caledon in Northern Ireland and Alexanders of Menstrie in Clackmannanshire, Scotland. This suggests that all four families likely came from the same part of Scotland where they probably shared a common heritage. The interesting thing about the Alexanders of Paisley is that they were first documented in 1413, about a hundred years before Thomas Alexander was recorded in Menstrie.

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