British names for Baby Boys – O
- Oakes – the one from the oak tree groove
- Oakley – the one from the meadow of the oak trees
- Ocelfa – the one from the elevated planes
- Ocvran –the hero of Arthurian legend – the father of Guinevere
- Odale – the one who is coming from the valley
- Odam – a son in law
- Oder – the one from the river
- Ogden – the one from the valley of oaks
- Ogelsvy– the fearsome warrior
- Olin– the one who is happy
- Olney – the one from the loner‘s field
- Oram – the one from the enclosure near the river bank
- Ord – a spear
- Ordland – the one from the pointed hill
- Orford – the one from the cattle ford
- Orlege – the one who is suffering the strife during the war
- Orman – the one who wields a spear
- Ormond – the one who defends with a spear
- Orrick – the one from the old oak tree
- Orrin – the one from the river
- Orth – the honest one
- Orton – the one from the village near the shore
- Orval – the one who is strong like a spear
- Orvin – a spear friend
- Os– divine
- Oscar – the spear of gods
- Osgood – the god of Goths
- Osier – the one who is living near the willows
- Osred – the one who gets his counsel from God
- Osric– the one who is following the rules of God
- Ossie – a form of a name Oswald- the power of God
- Oswald – the power of God
- Oswin – a friend of God
- Oswiu – a king
- Overton – the one from the upper town
- Oxford – the one from the oxen‘s crossing
- Oxley – the one from the meadow of oxen
- Oxton – the one from the town of oxen
