an accident […] rendered him permanently lame, and therefore unfitted him, in the opinion of his parents, to inherit his father's many titles, which, it was then arranged, should devolve upon his younger brother.

Google翻訳 / DeepL翻訳

詳細

意味（3）

(transitive) To delegate (a responsibility, duty, etc.) on or upon someone.

They devolved their whole authority into the hands of the council of sixty.

Google翻訳 / DeepL翻訳

詳細

意味（4）

(intransitive) To fall as a duty or responsibility on or upon someone.

, Episode 16:

For the nonce he was rather nonplussed but inasmuch as the duty plainly devolved upon him to take some measures on the subject he pondered suitable ways and means during which Stephen repeatedly yawned.

Google翻訳 / DeepL翻訳