Ravenscroft (English) comes from Old English hræfn, from Proto-West Germanic hrabn, from Proto-Germanic hrabnaz, from Proto-Indo-European ḱorh₂-, from Proto-Indo-European ḱer-, from Proto-Indo-European kr̥-, from Proto-Indo-European ker- — army.
Ancestry of “Ravenscroft”, step by step
Ravenscroft traces back through two separate lines of ancestry.