Last names from COS to COSTOPOULOS

Each of the names is displayed with corresponding data on the name's rank and the number of time it shows up in census. Some surnames are also augmented with information about their origins and meanings. Names are sorted in alphabetical order.


Name Rank RankDelta Count Origin Meaning
2000 census 1990 census in
rank		 2000 census
Cos 58,999 47,864 Down Arrow 321 Romanian Name COS is a Latin ...
Cosand 71,143 Up Arrow 256
Cosart 129,619 Up Arrow 121
Cosay 102,691 Up Arrow 162
Cosbey 103,193 Up Arrow 161
Cosby 3,242 2,917 Down Arrow 10,121 Jewish
Cosca 109,915 86,485 Down Arrow 149 Jewish
Coscarelli 64,572 Up Arrow 288 Italian
Coscia 18,135 23,925 Up Arrow 1,416 Spanish
Cosco 56,246 Up Arrow 340 Italian
Cosden 90,252 52,357 Down Arrow 190
Cose 64,934 57,872 Down Arrow 286 Jewish
Cosen 105,374 52,356 Down Arrow 157 Belgian
Cosens 49,249 Up Arrow 401 English In many cases a natu...
Cosentino 7,262 9,459 Up Arrow 4,238 Italian
Cosenza 15,340 18,759 Up Arrow 1,759 Italian
Coseo 99,214 Up Arrow 169
Cosey 17,122 10,645 Down Arrow 1,529
Cosgrave 51,458 44,205 Down Arrow 380 English Local: Of Cosgrove, ...
Cosgray 76,946 64,870 Down Arrow 232


Name Rank RankDelta Count Origin Meaning
2000 census 1990 census in
rank		 2000 census
Cosgriff 38,320 36,048 Down Arrow 543 English Local: Of Cosgrove, ...
Cosgro 143,847 Up Arrow 106
Cosgrove 3,480 4,098 Up Arrow 9,393 English Local: Of Cosgrove, ...
Cosh 83,965 Up Arrow 208
Coshatt 88,461 Up Arrow 195
Coshow 77,222 73,986 Down Arrow 231
Cosic 62,775 Up Arrow 298 Croatian Name COSIC is a Lati...
Cosico 97,384 73,985 Down Arrow 173 Mexican
Cosier 82,691 86,484 Up Arrow 212 Hungarian
Cosimano 73,931 Up Arrow 244
Cosino 146,011 Up Arrow 104
Cosio 14,841 20,312 Up Arrow 1,832 Italian
Cosker 121,780 Up Arrow 131
Coskey 70,052 64,869 Down Arrow 261
Coskun 127,186 Up Arrow 124 Turkish
Cosky 115,489 Up Arrow 140
Cosler 104,819 Up Arrow 158
Coslet 88,083 Up Arrow 196 Romanian
Coslett 47,838 64,868 Up Arrow 416
Cosley 67,113 64,867 Down Arrow 275
Genealogical Societies
Name Rank RankDelta Count Origin Meaning
2000 census 1990 census in
rank		 2000 census
Coslow 64,385 73,984 Up Arrow 289
Cosma 41,262 73,983 Up Arrow 498 Greek
Cosman 29,142 73,982 Up Arrow 766 Jewish
Cosmano 120,330 Up Arrow 133
Cosmas 84,631 Up Arrow 206
Cosme 7,420 5,374 Down Arrow 4,140 Spanish
Cosmo 60,887 57,870 Down Arrow 309 Italian
Cosmos 74,164 Up Arrow 243 Greek
Cosner 12,630 13,826 Up Arrow 2,249 Jewish
Cosom 129,619 Up Arrow 121
Cospelich 130,443 Up Arrow 120
Cosper 11,032 7,422 Down Arrow 2,644
Cospito 150,436 Up Arrow 100
Coss 8,366 8,072 Down Arrow 3,634 Jewish
Cossa 84,968 47,863 Down Arrow 205 Mozambican
Cossaboom 91,404 86,482 Down Arrow 187
Cossaboon 60,706 86,481 Up Arrow 310
Cossack 144,908 Up Arrow 105
Cossairt 48,776 27,839 Down Arrow 406
Cossar 100,663 Up Arrow 166 Irish
British Counties
Name Rank RankDelta Count Origin Meaning
2000 census 1990 census in
rank		 2000 census
Cossart 148,244 Up Arrow 102 Irish
Cosse 55,003 Up Arrow 350 Greek Name COSSE is a Lati...
Cosseboom 129,619 Up Arrow 121
Cossel 68,973 47,862 Down Arrow 266 Austrian
Cossell 111,740 64,865 Down Arrow 146
Cosselman 146,011 36,047 Down Arrow 104 Jewish
Cossentino 84,310 Up Arrow 207
Cossette 18,765 14,095 Down Arrow 1,351
Cossey 12,897 10,935 Down Arrow 2,187 English Local: At the causew...
Cossick 142,819 Up Arrow 107
Cossin 42,983 52,354 Up Arrow 474 English Nickname: The cousin...
Cossins 107,038 Up Arrow 154 English Nickname: The cousin...
Cossio 20,543 32,208 Up Arrow 1,200 Spanish
Cossitt 85,996 Up Arrow 202
Cossman 56,979 Up Arrow 335 Jewish
Cosson 50,801 Up Arrow 386 Jewish
Cossu 113,519 Up Arrow 143 Belgian
Cossyleon 109,915 Up Arrow 149
Cost 17,582 16,215 Down Arrow 1,474 English The son of Constanti...
Costa 900 1,076 Up Arrow 35,227 Italian From the coast.
USA Counties
Name Rank RankDelta Count Origin Meaning
2000 census 1990 census in
rank		 2000 census
Costabile 24,529 47,861 Up Arrow 955 Italian
Costagliola 50,903 30,586 Down Arrow 385 Italian
Costain 60,390 57,869 Down Arrow 312 English The son of Constanti...
Costakis 126,400 Up Arrow 125
Costales 17,548 13,825 Down Arrow 1,479 Spanish
Costan 104,257 Up Arrow 159 Romanian
Costante 106,477 Up Arrow 155
Costantini 23,264 64,864 Up Arrow 1,023 Italian
Costantino 9,845 17,400 Up Arrow 3,028 Italian
Costanza 9,249 13,554 Up Arrow 3,242 Italian
Costanzi 97,384 86,480 Down Arrow 173
Costanzo 5,407 8,495 Up Arrow 5,928 Italian
Costarella 121,780 Up Arrow 131
Costas 20,763 18,758 Down Arrow 1,183 Spanish
Coste 31,426 73,980 Up Arrow 697 English The son of Constanti...
Costea 59,916 Up Arrow 315 Romanian
Costeira 120,330 86,479 Down Arrow 133 Portuguese
Costell 101,157 41,058 Down Arrow 165
Costella 42,912 26,691 Down Arrow 475 Italian
Costello 1,025 1,297 Up Arrow 31,266 English Local: Of Costello, ...
GenealogyDig logo
Name Rank RankDelta Count Origin Meaning
2000 census 1990 census in
rank		 2000 census
Costelloe 86,992 Up Arrow 199 English Local: Of Costello, ...
Costelow 103,193 Up Arrow 161
Costen 39,444 52,353 Up Arrow 525 English The son of Constanti...
Costenbader 61,058 Up Arrow 308
Coster 17,351 18,757 Up Arrow 1,502 English Nickname: Round-head...
Costes 80,502 Up Arrow 219 Basque
Costi 115,489 Up Arrow 140 Jewish
Costic 83,965 Up Arrow 208 Croatian Name COSTIC is a Lat...
Costich 117,538 Up Arrow 137 Croatian
Costick 126,400 Up Arrow 125 Name COSTICK is a La...
Costigan 12,193 15,220 Up Arrow 2,343 Irish
Costill 130,443 Up Arrow 120
Costilla 13,731 13,091 Down Arrow 2,024 Jewish
Costillo 35,797 18,756 Down Arrow 593
Costilow 46,000 27,838 Down Arrow 437
Costin 14,574 13,553 Down Arrow 1,873 English The son of Constanti...
Costine 60,557 57,868 Down Arrow 311
Costley 15,509 27,837 Up Arrow 1,733 Irish
Costlow 22,011 41,057 Up Arrow 1,098
Costner 10,645 12,455 Up Arrow 2,759
Name Rank RankDelta Count Origin Meaning
2000 census 1990 census in
rank		 2000 census
Costo 88,461 Up Arrow 195 Jewish
Costolo 130,443 Up Arrow 120
Coston 6,580 6,235 Down Arrow 4,750 English The son of Constanti...
Costopoulos 103,706 Up Arrow 160

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