Writers name their characters with the utmost care; they hint at things like the characters' backstories, motivations, personalities — even their futures. Nearly every protagonist in a Studio Ghibli movie has a significant meaning tied to their name. A name can be tied to a historical figure, another literary character, or a word that symbolizes the protagonist's journey.
Source:https://www.cbr.com/cool-name-meanings-studio-ghibli-films-ranked/