Kingdom

Cumbria title IDs

The de jure lands of Cumbria in patch 1.20.0.3: 1 duchies, 0 counties and 0 baronies, in the order the game nests them. Cumbria lies in the empire of Britannia (e_britannia). Its capital is Cumberland.

give_title k_cumbria

How to use these IDs in the console

In Steam, add -debug_mode to the game's launch options (Properties → General).
In the game, open the console with the ` key (§, ~ or ^ on some keyboards).
Paste the command (give_title k_cumbria) and press Enter. Using the console turns achievements off for that game.

Cumbria duchy

give_title d_cumbria

Source: game/common/landed_titles/00_landed_titles.txt and the English localisation, Crusader Kings III 1.20.0.3. Commands as listed on the official wiki's console page. See also title IDs, character IDs, dynasty IDs and nicknames.