I van Oyen invented (or designed).
I de Witte made (or created).
Translation Notes:
The term "invenit" is from Latin, typically referring to the designer or inventor of the work. "Fecit" is also Latin, used to indicate the artist or maker of the piece.
Page Summary:
The text indicates the creators of the engravings: I van Oyen, who designed the work, and I de Witte, who created it. These terms highlight their roles in producing the artwork, typical of historical art books showing attributions.