Cook Inlet | Beaufort Inlet | Rankin Inlet | Pond Inlet | Adrien de Gerlache | Teal Inlet | Ocracoke Inlet | Murrells Inlet, South Carolina | Mount Gerlache | Gerlache Island | Case Inlet steamboats | Burrard Inlet | Bathurst Inlet | Aireys Inlet | Wingan Inlet | Shinnecock Inlet | Sebastian Inlet | Ponce Inlet, Florida | Hamilton Inlet | Geikie Inlet | Chesterfield Inlet | Budd Inlet | Anderson Inlet's intertidal mudflats are of world importance for Red-necked Stint | Admiralty Inlet |
Several geographical features were named in his honor, mostly in Antarctica: Cape Gerlache, Mount Gerlache, Gerlache Inlet, Gerlache Island, Gerlache Strait and the de Gerlache seamounts, as well as Pic de Gerlache in Greenland and de Gerlache crater, near the south pole of the moon.