some of them never belonged to the sumerian pantheon, however.

like the younger gods, such as Horus, Osiris, Seth or Isis and many others. they should be called by the true names.

Ningishzidda is only his Title. His name is Toth.

Marduk used RA as a title, Marduk is his name.

the others you may address as you wish, though their older names are their sumerian names. Enki/Ea/Nidimud, Ninti/Ninmah/Ninharsag/Sud.

Enlil, and Ninurta and the rest of Enlil's descendants had no place in the egyptian pantheon.

ALL of them and their tales and exploits were misinterpreted and renamed as the entire greek pantheon. Many single entities take on several identities in the greek myths.