Surname List: Begins with O

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All surnames beginning with O, sorted alphabetically (total individuals):

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1. O"BRIEN (1)
2. O"CONNOR (1)
3. O"LAUGHLIN (1)
4. O"LEARY (1)
5. O'BRIAN (1)
6. O'BRIEN (24)
7. O'CALLAGHAN (1)
8. O'CONNELL (7)
9. O'CONNOR (11)
10. O'DELL (3)
11. O'DONNEL (1)
12. O'DONNELL (1)
13. O'GRADY (1)
14. O'HALLORAN (11)
15. O'HARA (1)
16. O'HARRA (1)
17. O'HEARN (1)
18. O'KEEFE (1)
19. O'LAUGHLIN (1)
20. O'LEARY (4)
21. O'LOUGHLIN (1)
22. O'MEARA (3)
23. O'REILLY (40)
24. O'SHEA (9)
25. O'TOOLE (1)
26. OAKES (5)
27. OAKLEY (7)
28. OAKS (1)
29. OATMAN (1)
30. OATNEY (3)

31. OBERER (3)
32. OBERLANDER (1)
33. OBERWITTE (7)
34. OBRINGER (83)
35. OBRYAN (1)
36. ODENWELLER (1)
37. ODOM (1)
38. ODOSKI (1)
39. ODRONIC (1)
40. OEHLER (1)
41. OELLERMAN (1)
42. OEN (33)
43. OERTMAN (1)
44. OESWEIN (3)
45. OFFENBACHER (3)
46. OGDEN (4)
47. OGLE (1)
48. OGLESBEE (6)
49. OGNIBENE (4)
50. OHLER (1)
51. OHLINGER (1)
52. OHMES (1)
53. OHNEWEHR (3)
54. OILER (1)
55. OKONEK (1)
56. OLBERDING (36)
57. OLDHAM (2)
58. OLDIGES (125)
59. OLDING (41)
60. OLENDICK (1)

61. OLER (1)
62. OLIGER (2)
63. OLIGSCHLAEGER (3)
64. OLIVEIRA (1)
65. OLIVER (4)
66. OLMSTEAD (3)
67. OLNEY (3)
68. OLNHAUSEN (1)
69. OLSEN (2)
70. OLSON (3)
71. OLWINE (2)
72. OMAN (2)
73. OMBRELLO (7)
74. OMEARA (8)
75. OMER (1)
76. OMLAR (1)
77. OMLOR (12)
78. ONDERA (1)
79. ONEIL (2)
80. ONEILL (1)
81. ONKST (1)
82. ONTROP (42)
83. OOMENS (1)
84. OOSTVEEN (1)
85. OPPENAUGH (1)
86. OPPENHEIM (3)
87. OPPERMAN (58)
88. ORBAN (8)
89. ORBERSON (1)
90. ORDEAN (1)

91. ORDING (37)
92. ORDWAY (1)
93. ORF (7)
94. ORICK (4)
95. OROSZ (1)
96. ORPEN (1)
97. ORPHAL (1)
98. ORR (4)
99. ORTIZ (3)
100. ORTMAN (19)
101. ORTMANN (1)
102. ORTWERTH (1)
103. ORWIG (1)
104. ORY (2)
105. OSBORN (1)
106. OSBORNE (9)
107. OSBOURNE (1)
108. OSBRAY (2)
109. OSSEGE (2)
110. OSTDIEK (1)
111. OSTEHEIMER (1)
112. OSTENDORF (1)
113. OSTERDAY (1)
114. OSTERFELD (22)
115. OSTERHOLT (62)
116. OSTERLOH (56)
117. OSTING (2)
118. OSTMAN (2)
119. OSTMANN (1)
120. OSWALD (1)

121. OSWALT (6)
122. OTIS (3)
123. OTT (10)
124. OTTE (101)
125. OTTEN (4)
126. OTTENWESS (1)
127. OTTENWESS RIBBERMAN (1)
128. OTTERBACHER (3)
129. OTTING (92)
130. OTTO (1)
131. OURIEFF (1)
132. OURS (1)
133. OUTCALT (4)
134. OVERBECK (2)
135. OVERHOLSER (18)
136. OVERLEY (1)
137. OVERLY (2)
138. OVERMAN (116)
139. OVERMANN (1)
140. OVERMEYER (3)
141. OVERMOHLE (1)
142. OVERTON (1)
143. OWEN (4)
144. OWENS (7)
145. OWINGS (2)
146. OZAR (1)
147. OZBIRN (3)
148. OZBURN (3)