Just saw this on TrekCentral. Background references to legacy Star Trek characters.
Capt. Will Decker : Star Trek TMP
Capt. John Harriman (Captain of Enterprise-B) : Star Trek Generations
Capt. Carol Freeman (Captain of Cerritos) : Star Trek Lower Decks
Capt. Cristobal Rios (Captain of Stargazer) : Star Trek Picard
Capt. Amina Ramsey (Captain of Oakland) : Star Trek Lower Decks
Cmdr. Hugh Culber (CMO of Discovery) : Star Trek Discovery
Capt. Clark Terrell (Captain of Reliant) : Star Trek II
Lt.Cmdr. B'elanna Torres (CEO of Voyager) : Star Trek Voyager
Capt. Sonya Gomez (Captain of Archimedes) : Star Trek Lower Decks (previously Engineer on Enterprise-D) : Star Trek TNG
Cmdr. Beckett Mariner : Star Trek Lower Decks
There's also a Dax on there, a Garak (Not Elim), and I'm sure I've heard of some of the others, but that's what I got.