preoccupant
/prɪˈɒkjʊp(ə)nt/ /priːˈɒkjʊp(ə)nt/adjective
Previously occupying; preoccupying, mentally absorbing.
noun
A person who occupies (a place or region) before others; a previous or earlier occupant. Now rare.
Origin
Mid 17th century. As adjective from pre- + classical Latin occupant-, occupāns, present participle of occupāre occupy, after preoccupy; compare slightly earlier preoccupying. As noun from pre- + occupant, after preoccupy.