Where does “intianjättiläisharmaaorava” come from?

intianjättiläisharmaaorava (Finnish) comes from Finnish jättiläinen, from Finnish lainen, from Finnish laji, from Old Swedish slagh, from Middle Low German slach, from Old Saxon slag, from Proto-West Germanic slagi, from Swedish slagg — to hit; strike; to hit, strike, throw; to hit,...