Grassholm is an island 1 mile (1.6 km) south of Frida Hole, along the south coast and near the west end of South Georgia. The name "Em Island" was given for this feature, probably by Discovery Investigations personnel who surveyed this coast in 1926. The South Georgia Survey, 1951–52, reported that this feature is known to whalers and sealers as "Grassholmen," and that Em Island is unknown locally.