 Nyora kupfuurira kweiyi ndima - Alexander akaberekwa musi wa 26 March 1746 muIreland. Akanga ari mwanakomana wechishanu waAlexander Stewart nomudzimai wake Mary Cowan. Mhuri yababa vake yaiva yeUlster Scots uye yakabva kuCounty Donegal. Baba vake vakanga vatenga zvivako zveNewtownards neComber muCounty Down muna 1743 uye vaigara paMount Stewart, pedyo neNewtownards. Baba vake vakanga vachiriwo alderman weLondonderry kana kuti Derry muna 1760. Sekuru vake, Colonel William Stewart, vakanga vatungamirira rimwe remapoka maviri emasoja echiPurotesitendi ayo Derry akabvuma kupinda muguta apo Mountjoy akatumirwa kuDerry naTyrconnell kusati kwatanga kukombwa. Amai vaAlexander vakanga vari mwanasikana waJohn Cowan, alderman weDerry uye hanzvadzi yaRobert Cowan, Gavhuna weBombay. Mhuri yake yakanga iriwo yeUlster Scots. Vabereki vake vakanga varoorana pana 30 June 1737 muDublin. 