Obbo, Marcus (I) · Naples · worked 1707–1760
Obici, Bartolomeo (II) · Verona · worked 1750–1762
Obizzi, Marquis Tomasso Degli · Padua · worked 1769
Odani, Giuseppe Morello · Naples · worked 1730–1760
Odoardi, Giuseppe · Ascoli and 2 more · b. 1746
Oernberg, N. · Westeras · worked 1790
Ohberg, Johann (I) · Stockholm · 1723–1779
Ohberg, Johann (II) · Stockholm · 1753–1781
Olsen, Engel · Bjotveit · worked 1770–1792
Ongaro, Ignazio · Venice · b. 1741
Ongaro, Zuanne · Venice · 1708–1779
Onizin, Nicolaus · Mittenwald · worked 1760–1793
Opfermann, Johann Georg · Gotha · b. 1754
Opperdoes, Pieter · Amsterdam · 1684–1711
Orelli, Josef · Rome
Orselli, Giacomo · Rome · b. c.1793
Orselli, Giuseppe · Rome · b. c.1772
Ortega, Ascencio · Madrid · d. 1845
Ortega, Silverio · Madrid · worked 1770–1820
Ory · Paris · worked 1790–1814
Ostermunchner, Andreas · Markneukirchen · worked 1720–1725
Ostler, Andreas · Wroclaw · worked 1730–1770
Ostler, Frantz · Vienna · d. 1729
Ott, Johann · Fussen · 1674–1736
Otto, Carl Christian · Weimar · 1792–1853
Otto, Ernst Louis Georg · Dusseldorf
Otto, Georg August Gottfried · Weimar · 1789–1857
Otto, Jacob August · Gotha · 1760–1829
Ottomanus · Istanbul · worked 1710–1720
Ouvrard, Jean · Paris · d. 1748