CREATE TABLE table_21061 ("Name" TEXT, "Latitude" TEXT, "Longitude" TEXT, "Diameter" TEXT, "Year named" FLOAT, "Namesake" TEXT)

When the longitude is 147.1w what is the namesake of the feature?
SELECT "Namesake" FROM table_21061 WHERE "Longitude" = '147.1W'
SELECT "Namesake" FROM "table_21061" WHERE "Longitude" = '147.1W'