Irish Names Starting With O
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Check our list of names for Irish baby names starting with O letter with meaning for your loved ones.
Explore our list and get the right one for your little kid.
Irish Baby Names That Start With O Letter & Meaning (List 1)
Let's checkout below list, what are the Irish names starting with O letter with meaning and usage.
| Name | M/F | Meaning |
|---|---|---|
| O'brian |  |
Meaning : Surname. Used in : Irish |
| O'brien | |
Meaning : Surname. Used in : Irish |
| O'keefe | |
Meaning : Surname. Used in : Irish |
| O'shay | |
Meaning : Surname. Used in : Irish |
| O'shea | |
Meaning : Surname. Used in : Irish |
| Oach |  |
Meaning : Keen-ear Or Big-ear Used in : Irish |
| Obharnait | |
Meaning : The Color Of Olive Used in : Irish |
| Ockan | |
Meaning : Brown Horse, Horse Lover Used in : Irish |
| Ockey | |
Meaning : Horseman Used in : Irish |
| Ockvilly | |
Meaning : Horse Soldier Used in : Irish |
| Odanodan | |
Meaning : Of The Red Earth Used in : Irish |
| Odar | |
Meaning : Dark, Grey-brown Used in : Irish |
| Odarnait | |
Meaning : Small Or Pale One Used in : Irish |
| Odell | |
Meaning : Surname. Used in : American, African, Anglo, English, French, German, Greek, Greek, Irish, Jamaican, Norse, American, Australian, British |
| Odhamnait | |
Meaning : Dun, Swallow Used in : Irish |
| Odhar | |
Meaning : Dark, Grey-brown Used in : Celtic, Irish |
| Odharnait | |
Meaning : Little Swallow One, Pale Used in : Gaelic, Irish |
| Odhran | |
Meaning : Little Pale Green One Used in : Celtic, Irish |
| Odran | |
Meaning : Pale Green Used in : Australian, Celtic, French, Gaelic, Irish |
| Oengus | |
Meaning : Excellent, Strength, Vigour, Dream, Swan Used in : Irish |
| Oengusa | |
Meaning : Unique Choice, Chosen One Used in : Irish |
| Ogan | |
Meaning : Youth, Lad Used in : Hindu, Turkish, Irish |
| Ohnicio | |
Meaning : Honor Used in : Irish |
| Oilbhe | |
Meaning : Olive Used in : Irish |
| Oilibhear | |
Meaning : Relic, Heir To His Ancestors Used in : Irish, Norse |
| Oilleog | |
Meaning : A Sprite, Elf Used in : Irish |
| Oisin | |
Meaning : Little, Freckled Used in : Australian, Celtic, Irish |
| Oison | |
Meaning : A Deer Used in : Irish |
| Oissene | |
Meaning : A Deer Used in : Irish |
| Oissine | |
Meaning : A Deer Used in : Irish |
| Oistin | |
Meaning : Venerable Used in : Hindu, Irish, Irish, Latin |
| Oistin | |
Meaning : Venerable Used in : Hindu, Irish, Irish, Latin |
| Olaf | |
Meaning : Ancestor's Heirloom Used in : Australian, Swedish, Danish, French, German, Irish, Norse, Norwegian, Polish, Scandinavian, Swiss, Teutonic |
| Olan | |
Meaning : Royal Forefather Used in : American, Kurdish, French, Irish, Australian |
| Olave | |
Meaning : Ancestor's Relic Used in : German, German, Irish, Norse, Scandinavian |
| Olchobar | |
Meaning : Ruler's Name Used in : Celtic, Irish |
| Olibhear | |
Meaning : Seller And Processor Of Olive Oil Used in : Irish |
| Olive | |
Meaning : Olive Used in : Australian, English, French, German, Irish, Jamaican, Italian, Latin, American, Australian, Chinese, British, Danish |
| Oliver | |
Meaning : Olive Tree Used in : American, Australian, Chinese, British, Danish, Dutch, English, Finnish, French, German, Irish, Jamaican, Latin, Norse, Swedish, Swiss, Australian |
| Oma | |
Meaning : The Color Of Olive Used in : Hindu, Irish, Latin, American, Arabic, Hebrew, Sanskrit, Dutch, Gujarati |
| Omat | |
Meaning : The Color Of Olive Used in : Irish |
| Ona | |
Meaning : One, Together Used in : French, Irish, Latin, British, English, American, African, Australian, Hebrew, Danish |
| Onan | |
Meaning : Wealthy Used in : Japanese, Turkish, Irish |
| Onchu | |
Meaning : Fierce Hound Used in : Irish |
| Oney | |
Meaning : Honored, Honorable Used in : Irish, African, Australian |
| Onora | |
Meaning : Honor Used in : Irish, Latin |
| Oona | |
Meaning : One, Unity. Used in : Finnish, Greek, Irish, Latin |
| Oonagh | |
Meaning : Lamb, One, Unity Used in : Greek, Irish, Latin |
| Oonan | |
Meaning : Strength, Power Used in : Irish |
| Oran | |
Meaning : Sorrowful, Sorrow, Saint Used in : American, Hawaiian, Australian, Hebrew, Irish, British, Celtic, English, Gaelic, Irish |
| Oran | |
Meaning : Sorrowful, Sorrow, Saint Used in : American, Hawaiian, Australian, Hebrew, Irish, British, Celtic, English, Gaelic, Irish |
| Oren | |
Meaning : Pale Green, Fair, Pale-skinned. Used in : American, Hawaiian, Hindu, Hebrew, Japanese, Gaelic, Irish, Jewish |
| Orfhlaith | |
Meaning : Gold-princess Used in : Irish |
| Orflath | |
Meaning : Gold-princess, Gold-lady Used in : Irish |
| Orghlaith | |
Meaning : Golden Used in : Irish |
| Orin | |
Meaning : Dark, Hair, Haired Used in : American, Australian, Hebrew, Celtic, Gaelic, Greek, Irish, Australian |
| Orinthia | |
Meaning : Pine Tree, Fair, Pale Used in : Irish |
| Orla | |
Meaning : Golden, Princess Used in : French, German, Irish, Latin, Polish, Danish, Australian, Chinese, Hebrew |
| Orlagh | |
Meaning : Golden Queen Used in : Irish, Australian |
| Orlaith | |
Meaning : Golden, Princess Used in : Irish, Australian |
| Orlaithe | |
Meaning : Golden Used in : Irish |
| Ormand | |
Meaning : Red. Used in : Australian, British, English, Gaelic, German, Irish |
| Ormond | |
Meaning : Red. Used in : American, British, English, French, Gaelic, German, Irish, Teutonic |
| Ormonde | |
Meaning : Red. Used in : British, English, French, Gaelic, German, Irish |
| Orna | |
Meaning : Little Pale Green One, The Color Of Olive Used in : French, Irish, Australian, Hebrew |
| Ornait | |
Meaning : Lady, Fair, Locks Used in : Irish, Irish |
| Ornait | |
Meaning : Lady, Fair, Locks Used in : Irish, Irish |
| Ornat | |
Meaning : Small Or Pale One Used in : Irish |
| Ornora | |
Meaning : Honor Used in : Irish, Latin |
| Orran | |
Meaning : Pale Green Used in : American, British, English, Gaelic, Irish |
| Orren | |
Meaning : Pale Green, Fair, Pale-skinned. Used in : American, Hebrew, British, English, Gaelic, Irish |
| Orrin | |
Meaning : Pale Green, Fair, Pale-skinned. Used in : American, Australian, Hebrew, British, English, Gaelic, Greek, Irish |
| Orthanach | |
Meaning : Potent in prayers or charms Used in : Irish |
| Oscar | |
Meaning : Divine Spear, Dear Friend, Lover Of Deer Used in : American, Australian, Chinese, British, Celtic, Danish, Dutch, English, French, German, Irish, Jamaican, Italian, Norse, Norwegian, Portuguese, Scandinavian, Swedish, Swiss, Australian, Dutch |
| Osgar | |
Meaning : God Spear, Gentle Friend Used in : Australian, British, Celtic, English, Irish |
| Osgur | |
Meaning : Divine Spear, Dear Friend, Spear Of The Gods Used in : Irish |
| Osheen | |
Meaning : Young Deer Used in : Celtic, Irish |
| Osmanna | |
Meaning : Saint's Name Used in : Irish |
| Osnait | |
Meaning : Deer Used in : Irish |
| Osnit | |
Meaning : Deer Used in : Irish |
| Ossan | |
Meaning : Little, Deer Used in : Irish |
| Ossian | |
Meaning : Young Deer, Little Deer Used in : Australian, Celtic, Danish, Finnish, Irish, Latin, Swedish |
| Otteran | |
Meaning : Prosperous, Wealthy Used in : Celtic, Irish |
| Ounam | |
Meaning : Little Adam Used in : Celtic, Irish |
| Owen | |
Meaning : Born Of Yew, Well Born Used in : American, Australian, British, Celtic, Danish, Dutch, English, French, German, Greek, Irish, Jamaican, Swedish, Welsh, Australian |
| Ownah | |
Meaning : Form Of Una, Unity Used in : Irish |
| Owney | |
Meaning : Green Elderly Used in : Irish |
| Ownry | |
Meaning : Ruler Of The State Used in : Irish |