1866 (MDCCCLXVI), she blein chadjin v'ee, ghow toshiaght Jelune rere yn eaillere Gregoiragh.

Taghyrtyn

• 8 Averil – Chroo reeriaghtyn yn Iddaal as y Phroosh cochaarjys noi Impiraght yn Austeyr.
• 8 Mean Souree – Haink Parlamaid y Chanadey ry-cheilley da'n chied cheayrt ayns Ottawa.
• 27 Jerrey Souree – Ren yn SS Great Eastern goaill jerrey rish soiaghey sheese y chaabyl çhellegraf harrish yn Atlantagh eddyr Dairbhre, Nerin, as Heart's Content, Thalloo yn Eeast.
• 12 Nollick – Bleaystey Oaks: Varr y cragh meaineraght smessey ayns Sostyn 383 meaineyderyn as sauaillee.
• Date gyn fys
  • Ren Alfred Nobel ynlaghey dynamite 'sy Ghermaan.

Ruggyryn

• 16 Jerrey Geuree – Percy Pilcher, ynlaghteyr as etleyder kioneraadagh Sostynagh (b. 1899)
• 2 Toshiaght Arree – Enrique Simonet, peinteyr Spaainagh (b. 1927)
• 13 Averil – Butch Cassidy, mooidjeen Americaanagh (b. 1908)
• 4 Mean Souree – Miina Sillanpää, politickeyr Finnlynnagh (b. 1952)
• 28 Jerrey Souree – Beatrix Potter, ughtar lioaryn paitçhyn Sostynagh (Peter Rabbit as Jemima Puddle-Duck) (b. 1943)
• 10 Mean Fouyir – Jeppe Aakjær, feelee as noaskeealagh Danvargagh (b. 1930)
• 21 Mean Fouyir – H. G. Wells, screeudeyr Sostynagh (b. 1946)
• 12 Sauin – Sun Yat-sen, irreyder magh Sheenagh (b. 1925)
• 12 Nollick – Alfred Werner, kemmnigagh Germaanagh, lauryssagh Aundyr Nobel (b. 1919)

Baaseyn

• 19 Jerrey Geuree – Harriet Ludlow Clarke, ellyneyr Goaldagh
• 20 Jerrey Souree – Bernhard Riemann, maddaghteyr Germaanagh (r. 1826)
• 1 Nollick – George Everest, geodesee Bretnagh (r. 1790)