Rennell
- Baron Rennell
- Francis Rodd, 2nd Baron Rennell
- James Rennell
- North Rennell Island
- Paul Rennell
- Renald
- Rennell Glacier
- Rennell Island
- Rennell Island monitor
- Rennell Rodd, 1st Baron Rennell
- Rennell Sound
- Rennell and Bellona Province
- Rennell fantail
- Rennell flying fox
- Rennell shrikebill
- Rennell starling
- Reynolds (disambiguation)
- South Rennell Island
- Thomas Rennell
- Thomas Rennell (scholar)
- Tremayne Rodd, 3rd Baron Rennell