Thomas Butler (b, c. 1777), Capt., Dublin Militia; emigrated to S. Africa, 1820.
Clue: With wife, Elizabeth (33) and children, Joseph (11), James (6) and Matilda (1 year), he led a party of 27 settlers from Co. Wicklow who eventually settled in the Zuurveld (later known as Albany), near Algoa Bay. In the same group was John Butler, aged 19 (per James's descendant, Mrs Simpson of Despatch, S. Africa, via Major R. E. Butler of California).
Reply: Thomas Butler became Capt. in Dublin (County) Militia, 1807 (List of Militia Officers, PRO, Kew)