Gerhardus and its shortened form Hardus are masculine given names of Dutch-language origin. People with those names include:
- Bernardus Gerhardus Fourie (AKA Brand Fourie, 19162008), South African youth pastor
- Francois Gerhardus Joubert (18271903), Boer general
- Rudolph Gerhardus Snyman (born 1995), South African rugby union player
- Gerhardus Liebenberg (born 1972), South African cricketer
- Gerhardus Petrus Christiaan de Kock (192689), South African banker, sixth Governor of the ABSA Bank
- Gerhardus Pienaar (born 1981), South African javelin thrower
- Hardus Viljoen (Gerhardus C. Viljoen, born 1989), South African cricketer
- Johannes Gerhardus Strijdom (18931958), Prime Minister of South Africa 195458
- Johannes Maritz (Johannes Gerhardus Maritz, born 1990), Namibian hurdler
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