Doctor Jeronimo Ramirez is a character created by Jean Van Hamme and Ted Benoit in the series of cartoon the Adventures of Blake and Mortimer.

Doctor Ramirez appears for the first time in the album the Strange appointment and this in a New Yorkean airport where it approaches Mortimer in which, through crowd, it recognized the brilliant inventor of the Swordfish. During the short conversation which rises from this meeting one learns that Ramirez then occupies a post of physicist in the nuclear center of Los Alamos. One can notice that Doctor Ramirez is a scientist whom one would tend to describe as energetic but more especially of at the very least rather extravagant. But it is not the first which one meets in the series (see Dr. Grossgrabenstein). Moreover the doctor, when it finds Mortimer, a little later in this adventure, proves to be for this last and Blake of an invaluable help. However, at the end of the history, hardly accustomed to the adventure and coming with our heroes to avoid accuracy the explosion of a bomb with hydrogen, Ramirez formulates the will to change trade and not to work never again in the atom. One does not know so finally it does it or not; the doctor, taken again by Yves Feels and André Juillard, does not say it when Blake and Mortimer find it in the Sarcophagi of the 6th continent. Ramirez works then, for the World Fair of 1958, with the preparation of the house of the United States of America just like Mortimer works with that of the British house and the professor Labrousse with that of the French house. The appearance of the doctor is, in this history, rather short; Blake and Mortimer meet it only when they visit the house of its country. At the time of this visit, after the serious electronic disturbances caused by the “sarcophagi took place”, weapons with long distance of a new type tested by terrorists in the Antarctic, Ramirez does not hide anything of its suspicions with respect to the Soviets that the atmosphere of Cold war gets to him.