He was very 'ambitious for' his children but not for himself. [=he wanted his children to be successful but he didn't feel the need to be successful himself]
The company was created by two very 'ambitious' young men in the early 1900s.
This 500-page book is her most 'ambitious' effort/project yet.
(..) Why wouldst thou be a breeder of sinners? I am myself indifferent honest Yet I could accuse me of such things that it were better my mother had not borne me I am very proud, revengeful, ambitious With more offences at my beck than I have thoughts to put them in... ...imagination to give them shape (..)2015 Hamlet
(..) To the wars, my boy, to the wars! Or at least the whisper goes so Our last king was, as you know, by Fortinbras of Norway... ...thereto pricked on by a most ambitious pride, dared to the combat In which our valiant Hamlet did slay this Fortinbras Who, by a sealed compact, (..)2015 Hamlet