Last names beginning with O

Last names from OBST to OCASIO

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	Rank	Delta	Count	Origin	Meaning
	2000 census	1990 census	in rank	2000 census
Obst	34,150	28,551		628	Jewish
Obuch	131,366			119	Polish
Obuchowski	54,269			356	Polish
Obusek	128,797			122	Slovakian
Oby	71,143	46,066		256	Irish
Obyrne	20,629	14,221		1,193		Originally "O'Bran,"...
Oca	66,878			276	Portuguese
Ocacio	134,929	80,390		115
Ocadiz	147,095			103
Ocain	32,652	42,652		663
Ocallaghan	10,588	11,990		2,779	Celtic	The descendants or t...
Ocallahan	55,481	50,181		346
Ocamb	96,033	50,180		176
Ocampo	1,903	2,790		17,334	Jewish
Ocampos	97,384			173
Ocana	17,282	20,055		1,508	Jewish
Ocanas	26,672	31,409		859
Ocano	108,153	61,499		152
Ocaranza	103,706			160	Basque
Ocarroll	36,807	46,065		572	Irish	Valorous in battle.
Name	Rank	Rank	Delta	Count	Origin	Meaning
	2000 census	1990 census	in rank	2000 census
Ocasio	4,268	3,384		7,685	Spanish