At last I found him! Mikhail Ivanovich Tereshchenko (Russian: Михаи́л Ива́нович Тере́щенко), Finance Minister of the Kerenski Russian Provisional Government [1886-1956]. Lawyer, art collector, publisher, businessman. Mason [lodge La Patite Ourse, St. Petersburgh].
John Grosvenor Beevor, SOE head in Portugal, disclose he was his first contact in this country. But I could not find any trace at all about him, but only references to his business activities in France, Monaco and Madagascar after the Bolshevik Revolution .
Tonight progress was made. He worked also in Mozambique, and yes, in Lisbon during WW2, undercovered.
Tereshchenko, visited Beevor in several occasions, calling for that a lady who was providing Red Cross passports as a intermediate. He had a house in Estoril, which was owned by a German and reported the relevant fact that led to the discovered by Section V of MI6 of one of the top German agents who spied for naval intelligence, mainly vessels routes.
He spoke nine idioms fluently [alias tirtheen], including Portuguese.Aleksandr Yakovlevich Golovin painted him, as can be seen here: