aiel
noun
ai·el ˈā(-ə)l 
plural -s
: a writ by which an heir entered into his grandfather's estate and dispossessed the third person who had attempted to gain possession
Word History
Etymology
Middle English, grandfather, from Middle French ael, aiuel, from (assumed) Vulgar Latin aviolus, diminutive of Latin avus grandfather
First Known Use
circa 1598, in the meaning defined above