Game concept

Suzerain

The game also links it as Suzerains, Suzerain's.

From the game's encyclopedia

A Suzerain is a Ruler with at least one Tributary. Suzerains may themselves be Tributaries to another Ruler, but they must never be Vassals.

The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.

Suzerain is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "A Suzerain is a Ruler with at least one Tributary." It is part of Ruler. The game also links it as Suzerains and Suzerain's. Patch 1.20.1.2, from game/common/game_concepts/mpo_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.

for a guide, post or blog

Source: game/common/game_concepts/mpo_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.