[Facts] Re: origin of the name "Etrick"
According to Hanks & Hodges, the two-t variety -- "Ettriche" (or "Ettrick") -- is also a form of "Edrich". Also the names "Etridge" and "Ettridge" springs from the same source.
I think it's a pretty safe bet that your father's name means: "prosperity + power".
-- Nanaea