CREATE TABLE table_203_41 (id DECIMAL, "name" TEXT, "variant name ( s ) " TEXT, "source" TEXT, "source coordinates" TEXT, "length" TEXT, "mouth" TEXT, "mouth coordinates" TEXT)

which tributary has at least 3 variant names ?
SELECT "name" FROM table_203_41 WHERE "variant name(s)" >= 3
SELECT "name" FROM "table_203_41" WHERE "variant name(s)" >= 3