200 Cool Boy Names Starting with O

200 NamesLetter OCoolFor Boys

Searching for baby boy names starting with O? This list has 200 beautiful options — from timeless classics to modern picks. Tap any name to copy it instantly.

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1 Otso
2 Ophiuchus
3 Orion
4 Odhrán
5 Osgar
6 Oddmund
7 Odovacar
8 Onofrio
9 Osher
10 Orhan
11 Octave
12 Oiva
13 Orval
14 Ottó
15 Octavius
16 Opeyemi
17 Orvar
18 Otieno
19 Oliwier
20 Olamide
21 Oghenekaro
22 Óðinn
23 Olli
24 Orestes
25 Olufemi
26 Osama
27 Ognjan
28 Oedipus
29 Osbourne
30 Octavianus
31 Ørjan
32 Ognen
33 Oluwatoyin
34 Orrin
35 Oden
36 Othniel
37 Oddr
38 Omer
39 Oluf
40 Orso
41 Orsino
42 Øystein
43 Oleksandr
44 Ovídio
45 Oghenekevwe
46 Oshea
47 Okeanos
48 Oleg
49 Ormazd
50 Olamilekan
51 Onesiphoros
52 Osee
53 Ode
54 Ophrah
55 Olukayode
56 Oidipous
57 Ozias
58 Olav
59 Ozihel
60 Odoacer
61 Olaf
62 Olumide
63 Oluchi
64 Oziel
65 Omiros
66 Onni
67 Olek
68 Osvald
69 Oddo
70 Osip
71 Orville
72 Obed
73 Olavo
74 Óscar
75 Osamu
76 Oluwasegun
77 Ourias
78 Ozan
79 Okropir
80 Olufunke
81 Oliver
82 Olavi
83 Oskari
84 Öztürk
85 Özgür
86 Olegário
87 Onofre
88 Onesimos
89 Otmar
90 Ori
91 Ödi
92 Ottorino
93 Oier
94 Oved
95 Ocean
96 Or
97 Oleksander
98 Oswin
99 Ortzi
100 Ollie
101 Óengus
102 Óskar
103 Ortwin
104 Ovadia
105 Onisim
106 Othello
107 Ole
108 Ožbalt
109 Origenes
110 Owain
111 Orazio
112 Oskars
113 Øyvind
114 Oliviero
115 Olev
116 Odysseus
117 Oran
118 Oswine
119 Ourbanos
120 Ouri
121 Obadiah
122 Otokar
123 Onnophris
124 Onesiphorus
125 Ottone
126 Oluwafemi
127 Ozi
128 Ólafur
129 Onesimus
130 Odin
131 Oluwakanyinsola
132 Osku
133 Oszkár
134 Olanrewaju
135 Ognjen
136 Ofek
137 Ondřej
138 Ovidius
139 Ozzie
140 Olof
141 Olexiy
142 Oded
143 Odilon
144 Osborn
145 Otgonbayar
146 Onésime
147 Othmar
148 Ossian
149 Orrell
150 Osmund
151 Ovid
152 Osiris
153 Obrad
154 Ognian
155 Orel
156 Onyekachukwu
157 Oli
158 Ognyan
159 Oliwer
160 Om
161 Oles
162 Oluwaseun
163 Ofydd
164 Olujimi
165 Ottomar
166 Onfroi
167 Osman
168 Odd
169 Oceanus
170 Oghenero
171 Ophir
172 Ohad
173 Øivind
174 Ove
175 Ottavio
176 Ottmar
177 Olov
178 Onur
179 Oswald
180 Ovidiu
181 Onuphrius
182 Osbeorn
183 Odo
184 Ödön
185 Oleksiy
186 Oisín
187 Ottaviano
188 Odilo
189 Otar
190 Ozzy
191 Ozazias
192 Omran
193 Onouphrios
194 Ohannes
195 Odran
196 Oriol
197 Ormond
198 Ogden
199 Octavian
200 Olivier
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Frequently Asked Questions

What are good names starting with O?

This page lists 200 names beginning with the letter O — a mix of timeless classics and fresh modern picks. Tap any name to copy it.

Why do parents choose names by letter?

Many families want names that match siblings, honor a relative initial, or simply love how a letter sounds. Picking a letter first narrows thousands of options into a manageable shortlist.

Are these names popular or rare?

Both. The list blends well-known favorites with uncommon finds, so you can go familiar or stand out — your call.

Can I use these names for characters or pets?

Yes. Letter lists are a favorite trick of authors and game masters for keeping character names consistent and memorable.

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