"Variant of Brooks"
The name Brooksie is commonly a female name from the "English" origin.
Brooksie is an English diminutive of the surname-derived name Brooks, formed with the -ie ending English uses for familiar forms such as Charlie from Charles and Annie from Ann. Brooks itself goes back to Middle English broc, meaning brook or stream, and began as a surname for someone who lived by one.
Brooks means "Dweller from the stream.".
The pronunciation of Brooksie is BROOK-see.