Irish baby boy names starting with O

Irish's most popular baby names of 2025 feature Oney as the top name for girls, while Oneil leads for boys. Other trending names in Irish include Onnie and Onna for girls, alongside Oissine and Odran for boys. Explore our complete list of Irish baby names for both genders below.

Irish baby names offer a rich blend of cultural heritage and modern appeal. Whether you're searching for popular girl names in Irish or exploring unique naming traditions, you'll find that each name carries its own story and meaning.

Updated: January 25, 2025, 6:02 pm

No.#	Names	Meanings
1.	Obrian Boy 2195	Surname
2.	Obrien Boy 4448	Surname
3.	Obrien Boy 2849	Exalted And High-minded
4.	Ockey Boy 5175	Horseman
5.	Ockvilly Boy 4651	Horse Soldier
6.	Odhar Boy 4360	Grey Brown; Dark
7.	Odharnait Boy 2018	Pale
8.	Odran Boy 3408	Pale Green
9.	Oengusa Boy 5666	Chosen One; Unique Choice
10.	Oilibhear Boy 2237	Relic

11.	Oilleog Boy 5252	A Sprite; Elf
12.	Oisin Boy 2903	Small Deer
13.	Oison Boy 3260	A Deer
14.	Oissene Boy 2277	Small Deer
15.	Oissine Boy 2334	Small Deer
16.	Oisyn Boy 2959	Small Deer
17.	Okeefe Boy 5662	Surname
18.	Okeefe Boy 3442	Descendent Of Caomh
19.	Olibhear Boy 2545	Seller; Processor Of Olive Oil
20.	Onchu Boy 4948	Fierce Hound

21.	Oneal Boy 3005	Champion
22.	Oneil Boy 4416	From The Chief&#x; S Line
23.	Oonan Boy 3102	Strength; Power
24.	Orthanach Boy 3542	Potent
25.	Osgar Boy 3654	God Spear; Or Deer Lover Or Champion Warrior
26.	Osgur Boy 4022	Divine Spear; Dear Friend
27.	Oshae Boy 4453	Hawklike; Stately
28.	Oshay Boy 4369	Surname
29.	Oshay Boy 4989	-
30.	Oshe Boy 2241	Son Of Shea
31.	Ossan Boy 4454	Little; Deer
32.	Otteran Boy 3851	Wealthy; Prosperous
33.	Ounam Boy 5910	Little Adam
34.	Owney Boy 3780	Green
35.	Ownry Boy 3636	Ruler Of The State
36.	Oy Boy 2442	Town Near The Boyne
37.	Oysin Boy 5115	Small Deer

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