Blazon Quarterly 1st and 4th grand quarters counterquartered 1st and 4th Azure three fleur-de-lys Or (Montgomerie); 2nd and 3rd Gules three annulets Or stoned Azure (Eglinton), all within a bordure Or charged with a double treasure flory counter-flory Gules; 2nd and 3rd grand quarters counterquartered 1st and 4th Or three crescents within a double treasure flory counterflory Gules (Seton); 2nd and 3rd Azure three garbs Or (Buchan) over all an escutcheon parted per pale Gules and Azure the dexter charged with a sword in pale proper pommelled and billed Or supporting an imperial crown the sinister charged with a star of twelve points Argent, all within a double treasure flory counterflory Gold.

Earl of Eglinton is a title in the Peerage of Scotland.

[2][1] In 1859, the thirteenth Earl of Eglinton, Archibald Montgomerie, was also created Earl of Winton in the Peerage of the United Kingdom, which gave him an automatic seat in the House of Lords, and both earldoms have been united since.

William Dunbar mentions a Sir Hugh of Eglinton in his Lament for the Makaris, citing him as a fellow poet.

The ancestral seat was Eglinton Castle in Kilwinning, North Ayrshire.