"Yeoman" is an antiquated term for farmers, tradesmen and other members of the early English middle class. The term suggests someone upright, sturdy, honest and trustworthy.
Yeoman is also a naval occupation, roughly equivalent to a secretary.
... de la Sécurité Extérieure[?] (DGSE)
Secretariat General de la Defense Nationale[?] (SGDN)
Germany
Bundesnachrichtendienst[?] (BND)
Nazi Germany
Abwehr, ...