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Name Explorer — Baby Names

Baby Names Starting with O

Looking for the perfect name? Browse first names from real South African records, see how popular each one is, and how many people of every age share it.

Names Starting with O — page 1 of 97

4,821 names

Sort: A–Z Most popular

Name	Boy / Girl	People	Surnames
O-Molemo	Unisex	5	5
O'arabile	Unisex	6	6
O'brain	Boy	44	34
O'brein	Boy	23	21
O'brey	Unisex	8	7
O'brian	Boy	168	143
O'brien	Boy	294	213
O'bryan	Boy	13	12
O'callaghan	Unisex	23	17
O'carroll	Unisex	5	3
O'connel	Boy	11	11
O'connell	Unisex	43	29
O'conner	Boy	12	12
O'connor	Unisex	90	63
O'deal	Girl	21	18
O'dean	Unisex	11	9
O'delia	Girl	20	19
O'dell	Unisex	6	6
O'dette	Girl	8	8
O'dille	Girl	6	6
O'donnell	Boy	23	16
O'donoghue	Unisex	7	7
O'donovan	Boy	19	13
O'fentse	Unisex	6	6
O'flynn	Unisex	9	8
O'grady	Unisex	16	13
O'hagan	Unisex	8	7
O'halloran	Unisex	8	3
O'hara	Unisex	32	29
O'jay	Boy	13	13
O'kelly	Unisex	10	7
O'kennedy	Unisex	49	28
O'leary	Unisex	11	8
O'lerato	Unisex	8	8
O'malley	Unisex	6	4
O'mara	Unisex	41	17
O'neal	Boy	179	154
O'neale	Unisex	13	13
O'neall	Unisex	6	6
O'neil	Boy	361	271
O'neill	Unisex	201	160
O'nell	Unisex	5	5
O'niel	Boy	65	60
O'niell	Boy	12	12
O'ratile	Unisex	8	8
O'rayn	Boy	15	15
O'refile	Unisex	5	5
O'regan	Boy	6	6
O'reilly	Unisex	47	38
O'rien	Boy	8	8

Our Baby Name Generator is based on our South African records, counting every first name a person has. Only real verified South African names are used with this tool. Due to privacy restrictions, records after 2010 are not included. * Updated 21 October 2026.