[13] Although Alexander was canonically married to Euphemia I, Countess of Ross, his contemporaneous union with Mairead appears to have been a Gaelic secular marriage.
His father, Robert II, King of Scotland, had similarly cohabited with Elizabeth Mure.
[21] In 1389, Euphemia, brought a complaint before the bishops of Moray and Ross, declaring that her marriage was a sham because Alexander was cohabiting with Mairead.
[19][note 3] In 1392, Antipope Clement VII finally terminated the marriage because it had been "the cause of wars, plundering, arson, murders, and many other damages and scandals".
[26] Mairead was evidently the mother of several of Alexander's children,[27] including his like-named son.