[4][need quotation to verify] The surname Logan is likely derived from the Gaelic word lagan or laggan meaning low-lying land, a glen, dell, or hollow.

They were specifically famed for their steadfast courage and patriotic loyalty, with many being slain in battle against the English invaders.

They were supporters of both William Wallace and Robert the Bruce in winning the independence of Scotland from England, both with fighting men and financially.

[5][6] Walter Logan, Lord of Hartside was a sheriff of Lanark in 1301, and in 1298 had received a grant of the lands of "Lus" from Robert Bruce.

[7] This Walter Logan appears twice on a roll of landowners forfeited in 1306 by Edward I, for supporting Robert the Bruce.

[10] Douglas and his company had joined Alfonso XI of Castile, who was campaigning against the Moors, in the Kingdom of Granada.

[9] Robert's son or grandson, John Logan of Restalrig, was made principal sheriff of Edinburgh by James II of Scotland.

[9] Sir Robert Logan did not pass away way without controversy, as he was put on trial for the Gowrie Conspiracy against King James VI in 1609, 3 years after his death, as Scottish Law required his body to be in the courtroom.

The society has persisted to today, where they hold yearly meetings, and continue to search for a legitimate chief, while also attempting to preserve and learn more of clan Logan's history and traditions.

Later in 1845 The Clans of the Scottish Highlands was published, which consisted of text from Logan, accompanied by illustrations from R. R. McIan.

[citation needed] Given the style of writing at the time and subtleties used by both the artist and writer, this is not a surprise and allows them to pay homage to the story of the origin of MacLennan.

Until the early nineteenth century, tartan patterns were probably based on locally available dyes, rather than being specific to surnames.

The crest badge suitable for members of Clan Logan contains the heraldic crest of a passion nail piercing a human heart, Proper;[1] and the heraldic motto HOC MAJORUM VIRTUS, which translates from Latin as "this is valour of my ancestors".

[1] According to Robert Bain, the slogan of Clan Logan is Druim-nan-deur (translation from Scottish Gaelic: "the ridge of tears").