Easy starts in CK3
The 25 bookmark characters that Crusader Kings III 1.20.0.3 itself labels Easy on the bookmark screen — the game's rating, not ours. Biggest realms first within each start date.
867(9)
King RostislavEasyGreat Moravia · Feudal · age 5227 counties, independentBookmark: Fathers of the Faithful
Björn IronsideEasyUppland · Tribal · age 4112 counties, independentBookmark: Wrath of The Northmen
Rurik RurikidEasyNovgorod · Tribal · age 3710 counties, independentBookmark: Humble Origins
Ivar the BonelessEasyIsles · Tribal · age 215 counties, independentBookmark: Wrath of The Northmen
Emir AdanisEasyBeja · Clan · age 444 counties, vassal of AndalusiaBookmark: The Struggle for Iberia
Jayavarman IIIEasyAngkor · Mandala · age 544 counties, independentBookmark: Living Gods on Earth
Halfdan WhiteshirtEasyYork · Feudal · age 393 counties, independentBookmark: Wrath of The Northmen
Ismail SamaniEasyBukhara · Clan · age 172 counties, vassal of TransoxianaBookmark: The Iranian Intermezzo
Jarl HæsteinnEasyMontaigu · Feudal · age 521 county, independentBookmark: Humble Origins
1066(12)
High Chieftain InanchEasyÖvörkhangai · Nomadic · age 3219 counties, vassal of Great LiaoBookmark: At the Gates
King Malcolm of ScotlandEasyScotland · Feudal · age 3518 counties, independentBookmark: The Fate of England
Duke VratislavEasyBohemia · Feudal · age 3414 counties, vassal of Holy Roman EmpireBookmark: Rags to Riches
King Svend of DenmarkEasyDenmark · Feudal · age 4713 counties, independentBookmark: The Fate of England
King Alfonso VIEasyLeón · Feudal · age 267 counties, independentBookmark: Iberia in Pieces
Kiyohara TakenoriEasyKiyohara Family · Sōryō · age 625 counties, vassal of JapanBookmark: A Never-Waning Moon
Petty King MurchadEasyMunster · Feudal · age 393 counties, independentBookmark: Rags to Riches
Kokotoy of the KirghizEasyKhakass Hollow · Nomadic · age 222 counties, independentBookmark: At the Gates
Prefect Sū ShìEasyMeizhou · Celestial · age 292 counties, vassal of QiongnanBookmark: Song of Splendor
Qín GuānEasyQín Family · Celestial · age 171 county, vassal of ChinaBookmark: Song of Splendor
Robert 'Phrangopoulos'EasyConquerors of Barbastro · Adventurer · age 26Landless adventurerBookmark: The Wandering Exiles
Wallada bint al-MustakfiEasyThieves of Pleasure · Adventurer · age 65Landless adventurerBookmark: The Wandering Exiles
1178(4)
Salāh al-Dīn YusufEasyEgypt · Clan · age 4077 counties, vassal of AlexandriaBookmark: Swords of Faith
Sultan Kilij ArslanEasyRum · Clan · age 4624 counties, independentBookmark: Call of the Empire
High Chieftain TemüjinEasyÖgräsh · Nomadic · age 164 counties, independentBookmark: The Endless Sky
Minamoto YoritomoEasyKawachi Family · Sōryō · age 312 counties, vassal of JapanBookmark: Rise of the Bushi
Source: difficulty = "BOOKMARK_CHARACTER_DIFFICULTY_EASY" in game/common/bookmarks, Crusader Kings III 1.20.0.3; realm sizes from history/titles.