Definitions for "Interloper"
One who interlopes; one who unlawfully intrudes upon a property, a station, or an office; one who interferes wrongfully or officiously.
to encroach on the rights of others; to intrude or interfere
someone who intrudes on the privacy or property of another without permission
aka "unregistered runner," aka "turkey," aka "bandit," a term used to refer to a runner who "participates" in a race without officially entering the race.
The Interloper is a fictional character appearing in the Marvel Comics universe. He is a member of the Eternals.
During the 17th century many attempts were made by various merchants or groups of merchants to break into the East India Company's monopoly of trade. These were known at that time as 'interlopers', another term for trespassers.
Keywords:  grantor, chain, outside, deeds, title
A grantor on a deed or other document outside the chain of title. A deeds to B who deeds to C. And X deeds to Y. X and Y are interlopers because they are outside of the chain of title.