Olmi, Alberto · Siena
Olmstead, S. C. · St. Paul · worked 1904
Olofsen, A. J. · Gothenburg
Olofsen, Axel · Upsala · worked 1894–1897
Olrichs, Diederich · Lubeck · worked 1650–1668
Olry, J. · Amiens · worked 1825–1854
Olsen, Anton Gustav · Drammen · worked 1926
Olsen, Cheston S. · Philadelphia · b. 1926
Olsen, Coleman F. · Oakland · d. 1984
Olsen, Engel · Bjotveit · worked 1770–1792
Olsen, Franz Josef · Tranas · worked 1925
Olsen, Harold Justin · Greenwood · b. 1921
Olsen, Lars Jorgen Rudolph · Copenhagen · 1889–1978
Olsen, O. H. · Paynesville · worked 1911–1926
Olshovy, August · Chicago · worked 1950
Olson, Anton · Varmland · b. 1883
Olsson, Edvin · Marmaverken · b. 1909
Olsson, J. E. · Hofors · b. 1899
Olsson, Karl Harry · Karlskoga · b. 1903
Olstead, George E. · Gainesville · b. 1899
Olsterman, Albert · San Jose · worked 1947–1960
Omond, James · Stromness · 1833–1907
Oneda, Gio Battista · Brescia
Ongaro, Ignazio · Venice · b. 1741
Ongaro, Zuanne · Venice · 1708–1779
Onizin, Nicolaus · Mittenwald · worked 1760–1793
Onken, Karl · Bremen · worked 1885–1914
Oosten, Alex · Rijswijk · 1946–1971
Opel, Walter · Erlbach · b. 1897
Opfermann, Johann Georg · Gotha · b. 1754
Opie, A. J. · Portsmouth · worked 1917
Opikhtin, A · Saint Petersburg
Opperdoes, Pieter · Amsterdam · 1684–1711
Orazio, di Giovanni Filippo · Rome
Orban, Imre · Budapest · b. 1898
Orelli, Josef · Rome
Orestad, Ivar · Bodo · 1883–1963
Orinthio, d’Essentier · Nancy
Orlandelli, Paolo · Cordogno
Orlandi, Ernesto · Cremona · b. 1929
Orlandi, Orlando · Ascoli Piceno · b. 1875
Orlandini, Archimede · Parma · 1909–2002
Orlecke, Heinrich Christian · Tangermunde · worked 1829
Orloff, Daniel · Wallace · b. 1922
Ornati, Giuseppe · Albairate, Milan · 1885–1965
Orr, George P. · Philadelphia
Orselli, Enrico · Ferrara, Pesaro · 1891–1955
Orselli, Giacomo · Rome · b. c.1793
Orselli, Giuseppe · Rome · b. c.1772
