in 1887 under grocers Holroyd, J., 1, Brisbane street Douglas see http://www.ee.surrey.ac.uk/Contrib/manx/fulltext/dd1887/dob_a.htm

no Holroyd in 1881 census except for 3 boarding boys - 2 at Strahellan and 1 at King Williams - Holroyd grocers dont appear befor 1887 so I think this dates their arrival to a year or so.