Family names that begin with the letter O

There are a total of 5,817,233 people from 146 countries with surnames that start with the letter O. Click a link below that corresponds to the first three letters of the last name you are searching for.

People by Country

The list below shows the total number of people by country for all names (last names/surnames/family names) starting with the letter O, sorted by the number of people in descending order.

Flag of Japan Japan 21,757
Flag of Kenya Kenya 8,163
Flag of Indonesia Indonesia 3,060
Flag of Malaysia Malaysia 2,962
Flag of Austria Austria 2,944
Flag of Peru Peru 2,281
Flag of Philippines Philippines 2,049
Flag of Denmark Denmark 2,000
Flag of Israel Israel 1,933
Flag of Finland Finland 1,882
Flag of Dominican Republic Dominican Republic 1,539
Flag of Hungary Hungary 1,391
Flag of Sri Lanka Sri Lanka 1,368
Flag of Czech Republic Czech Republic 1,182
Flag of Ecuador Ecuador 1,175
Flag of Kazakhstan Kazakhstan 1,059
Flag of Estonia Estonia 957
Flag of Pakistan Pakistan 849
Flag of Guatemala Guatemala 849
Flag of Slovenia Slovenia 733
Flag of Costa Rica Costa Rica 658
Flag of Latvia Latvia 628
Flag of Bangladesh Bangladesh 612
Flag of Uganda Uganda 600
Flag of Hong Kong Hong Kong 595
Flag of Cyprus Cyprus 555
Flag of Algeria Algeria 541
Flag of Uruguay Uruguay 520
Flag of Paraguay Paraguay 442
Flag of Ivory Coast Ivory Coast 441
Flag of Honduras Honduras 429
Flag of Croatia Croatia 388
Flag of Afghanistan Afghanistan 289
Flag of Luxembourg Luxembourg 283
Flag of Tanzania Tanzania 246
Flag of Cameroon Cameroon 243
Flag of Barbados Barbados 238
Flag of Lithuania Lithuania 238
Flag of Benin Benin 237
Flag of Senegal Senegal 229
Flag of Belize Belize 216
Flag of Burkina Faso Burkina Faso 176
Flag of Iraq Iraq 173
Flag of Georgia Georgia 170
Flag of Congo Congo 167
Flag of Kuwait Kuwait 154
Flag of Saint Lucia Saint Lucia 153
Flag of Nepal Nepal 146
Flag of Nicaragua Nicaragua 144
Flag of Somalia Somalia 129
Flag of Malta Malta 128
Flag of Saint Vincent and The Grenadines Saint Vincent and The Grenadines 122
Flag of Grenada Grenada 115
Flag of Albania Albania 114
Flag of Saint Kitts and Nevis Saint Kitts and Nevis 109
Flag of Kyrgyzstan Kyrgyzstan 104
Flag of United States Virgin Islands United States Virgin Islands 103
Flag of Reunion Reunion 97
Flag of Mauritius Mauritius 96
Flag of Uzbekistan Uzbekistan 95
Flag of Yemen Yemen 94
Flag of Aruba Aruba 83
Flag of Angola Angola 77
Flag of Togo Togo 75
Flag of Niger Niger 75
Flag of Botswana Botswana 70
Flag of Virgin Islands Virgin Islands 69
Flag of Mali Mali 65
Flag of United States Minor Outlying Islands United States Minor Outlying Islands 60
Flag of Liechtenstein Liechtenstein 56
Flag of Anguilla Anguilla 54
Flag of Seychelles Seychelles 53
Flag of Montserrat Montserrat 52
Flag of Bahamas Bahamas 51
Flag of Turkmenistan Turkmenistan 50
Flag of Haiti Haiti 47
Flag of Rwanda Rwanda 46
Flag of Sudan Sudan 44
Flag of Monaco Monaco 42
Flag of Mozambique Mozambique 41
Flag of Macau Macau 39
Flag of Zambia Zambia 39
Flag of Bermuda Bermuda 38
Flag of Gibraltar Gibraltar 37
Flag of Suriname Suriname 35
Flag of Laos Laos 35
Flag of French Polynesia French Polynesia 34
Flag of Faroe Islands Faroe Islands 34
Flag of Madagascar Madagascar 33
Flag of Netherlands Antilles Netherlands Antilles 33
Flag of Swaziland Swaziland 32
Flag of Papua New Guinea Papua New Guinea 32
Flag of Sierra Leone Sierra Leone 30
Flag of Guam Guam 29
Flag of Guinea Guinea 28
Flag of Gambia Gambia 28
Flag of Guadeloupe Guadeloupe 27
Flag of American Samoa American Samoa 26
Flag of Vatican City Vatican City 24
Flag of Cuba Cuba 23
Flag of Liberia Liberia 21
Flag of Guyana Guyana 21
Flag of French Guiana French Guiana 21
Flag of Ethiopia Ethiopia 21
Flag of Antigua and Barbuda Antigua and Barbuda 21
Flag of Djibouti Djibouti 20
Flag of Turks and Caicos Islands Turks and Caicos Islands 18
Flag of Greenland Greenland 18
Flag of Malawi Malawi 18
Flag of Fiji Islands Fiji Islands 18
Flag of San Marino San Marino 17
Flag of Tajikistan Tajikistan 16
Flag of Northern Mariana Islands Northern Mariana Islands 16
Flag of Burundi Burundi 16
Flag of Equatorial Guinea Equatorial Guinea 15
Flag of Eritrea Eritrea 15
Flag of Solomon Islands Solomon Islands 13
Flag of Cape Verde Cape Verde 13
Flag of Maldives Maldives 12
Flag of Vanuatu Vanuatu 10
Flag of Serbia Serbia 10
Flag of Central African Republic Central African Republic 10
Flag of Niue Niue 9
Flag of Tonga Tonga 8
Flag of Chad Chad 8
Flag of Bhutan Bhutan 8
Flag of Mayotte Mayotte 6
Flag of Tuvalu Tuvalu 6
Flag of East Timor East Timor 6
Flag of Lesotho Lesotho 6
Flag of Kiribati Kiribati 6
Flag of Syria Syria 4
Flag of Nauru Nauru 4
Flag of Marshall Islands Marshall Islands 4
Flag of Cook Islands Cook Islands 4
Flag of Samoa Samoa 3
Flag of North Korea North Korea 3
Flag of Comoros Comoros 2
Flag of Sao Tome and Principe Sao Tome and Principe 2
Flag of Slovakia Slovakia 2
Flag of Palau Palau 2
Flag of Pitcairn Islands Pitcairn Islands 2
Flag of Montenegro Montenegro 2
Flag of Micronesia Micronesia 2
Flag of Western Sahara Western Sahara 2
Flag of Antarctica Antarctica 2