Helm - Hert
- Helmholtz
- Helmholtz , Hermann Ludwig Ferdinand von
- Helmont , Jan Baptista van
- Hench
- Hench , Philip Showalter
- Henderson , Thomas
- Henry , Joseph
- Henry , William
- Henry Bragg
- Hensen , Viktor
- Heracleides of Pontus
- Heraclitus of Ephesus
- Herelle , Felix d'
- Hermite , Charles
- Hero of Alexandria
- Herophilus of Chalcedon
- Héroult
- Héroult , Paul Louis Toussaint
- Herschbach
- Herschbach , Dudley Robert
- Herschbach, Dudley Robert
- Herschel , Caroline Lucretia
- Herschel , Sir (Frederick) William
- Herschel , Sir John Frederick William
- Herschel, Sir (Frederick) William
- Hershey
- Hershey , Alfred Day