B    - (also a mutation of P; e.g. "Padarn" becomes "badarn" in "Llanbadarn")
Word element
MeaningExample of use
(sound file links underlined)
bach(adjective) small, little, lesser 
bach, (plural bachau)(noun), nook, corner, bend 
Badarnsee PadarnLlanbadarn
Baebay 
ban, (plural bannau)peak,crest, bare hill, beacon 
bancbank, hill, slopeBancyfelin
bangorconsecrated land or monastery within a wattle fenceBangor
bantvalley 
barcfield 
BedrPeter (saint) 
bedwen, (plural bedw)birch 
bedd, (plural beddau)grave 
beiliyard 
benend, top 
bendigaidblessed 
Berissee PerisLlanberis
berllanorchard 
berthhedge, bush 
betwschapel of ease, oratoryBetws-y-coed
beudycowshed 
blaen, (plural blaenau)head, summit, end, headwater, uplandBlaenau Ffestiniog
blaiddwolf 
blasmansion 
bodabode, dwellingBodelwyddan
boethhot 
boncynhillock 
bontsee pontTal-y-bont
borfapasture 
braichridge, spur, arm 
bran, (plural brain)crowCwmbran
brehill 
brentimber 
breninking 
brithmottled 
broregion, vale, lowland 
bronhill-breast, hill-sideBronllys
brwynrushes 
bryn, (plural bryniau)hillBryngwyn
buarthyard 
budrfoul 
bugailshepherd 
bwlch, (plural bylchau)pass, gapBwlch-y-sarnau
bwllpit, pool 
bwthyncottage 
bychanlittle, small, lesserMorfa Bychan
byrshort 

  P - (often mutates to B; e.g. "pont" becomes "bont" in "Tal-y-bont")
Word element
MeaningExample of use
(sound file links underlined)
Padarnsaint's name 
pandyfulling millTonypandy
panthollow, valleyPant-teg
parcpark, field 
penhead, top, end 
penrhynpromontoryPenrhyndeudreath
pentre(f)village, homesteadTonpentre
Perissaint's nameLlanberis
pistyllspout, waterfallPistyll Rhaeadr
plashall, mansionPlas Newydd
pontbridgePontrhydyfen
porthgateway, harbourPorthyrhyd
pwllpit, poolPwllheli