The Chilean Antarctic Expedition of 1947-48, under the command of Navy Captain Ernesto Gonzdlez Navarrete, made a survey of this area and gave the name "Islote Astrónomo Romero" after Astronomer of the Chilean Army Guillermo Romero González who was a member of the expedition and did astronomical work in the Antarctic.

Named by the fifth Chilean Antarctic Expedition, 1950-51, for Lieutenant Colonel Eduardo Saavedra R., chief army delegate aboard the ship Lautaro.

The name was conferred by the first Chilean Antarctic Expedition (1947) for First Lieutenant Custodio Labbé Lippi, navigation officer of the transport ship Angamos.

The Chilean Antarctic Expedition, 1947-48, charted the feature as three islands to which the personal names Rozas, Swett, and Horn were applied.

Charted as one island by Martin Halpern, leader of the University of Wisconsin geological party in this area, 1961-62, who reported the name "Largo" (meaning long) to be the only one used by Chilean officials at the nearby General Bernardo O'Higgins Station.

It lies 0.2 nautical miles (0.37 km; 0.23 mi) south of the eastern end of Largo Island and a like distance from the northern coast of Trinity Peninsula.

The name was given by Martin Halpern, leader of the University of Wisconsin United States Antarctic Research Program (USARP) field party which geologically mapped the Duroch Islands, 1961-62.

It honors Marcos Ortiz G., Captain of the Chilean ship Lientur which assisted in transporting the party during its study of this area.

The island lies 1 nautical mile (1.9 km; 1.2 mi) northeast of the Chilean scientific station, General Bernardo O'Higgins.

Named by Martin Halpern, leader of the University of Wisconsin field party during geological mapping of this area, 1961–62.

Named for Lautaro Ponce, Chief of Antarctic Operations, University of Chile, in appreciation for Chilean logistical support provided to the Wisconsin field party.

Named by Martin Halpern, leader of the University of Wisconsin (USARP) party during geological mapping of this area, 1961-62.

The principal outcrop of pebbly mudstone was found on this island and provides valuable data to the geologic history of the region.

A point on the northern coast of Trinity Peninsula directly south of the eastern part of the Duroch Islands.

Named by US-ACAN for Martin Halpern of the Geophysical and Polar Research Center, University of Wisconsin, Madison, leader of the field party which geologically mapped this area, 1961-62.

The name was applied by Martin Halpern, leader of the University of Wisconsin field party which geologically mapped these islands, 1961-62.

Named by him for Manuel Bulnes Sanfuentes, Minister of National Defense during the preceding Chilean Antarctic Expedition of 1947.

Discovered in February 1838 by Captain Jules Dumont d'Urville, who named it for Ensign Louis Tardy de Montravel of the expedition ship Zelée.

[26] This article incorporates public domain material from websites or documents of the United States Geological Survey.