https://screenrant.com/why-thrawn-calls-ahsoka-ronin-meaning/

Ahsoka (https://screenrant.com/ahsoka-episode-8-recap-spoilers/) episode 8 (https://screenrant.com/ahsoka-episode-8-star-wars-easter-eggs-references/) brings the confrontation between Thrawn and the titular Jedi to a head, with the former referring to the latter as a Ronin.