The nymphs are possibly inspired from Dante manuscripts

[Koen G]

Any MS that's a compendium and has different illustrated sections combines illustrations with different lineages. The constellation images have different origins than the diagrams, and scenes of common life, and religious scenes, and animals, and plants, drolleries, narrative scenes... And within each of those categories, one can look for different origins again - for example a manuscript with constellations and a zodiac often takes those from separate sources. Even in manuscripts with several Zodiac sequences, it may happen that those have different origins. 

Copying and compiling was the norm.