- Joshua Junt
- Johannes Jacobsson
Birth - 6 February 1840 (19 year anniversary) - Hajum, Goteborg, Bohus, Sweden - Heine Behr
- Joseph Duffield
- Henry Pinder
Death - 6 February 1661 (198 year anniversary) - Of Salisbury, Ipswich, Gloucester, England - Johann Medler
- Palne Jensen Juul
- Baron Henry De Percy
Birth - 6 February 1301 (558 year anniversary) - , Leconfield, Yorkshire, England - Kenneth I, King Scotland
Death - 6 February 859 (1000 year anniversary) - , Iona, Argyllshire, Scotland
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