From the English word "scout", meaning a person sent ahead to gather information. That word comes from Old French "escouter", "to listen". Harper Lee used the name for the lead character in To Kill a Mockingbird (1960).
Vibe
playfulstrong
How it ages.
Short, modern and easy to say, with a literary echo from To Kill a Mockingbird. Rare, but it suits a child who likes to explore.