The preposition bho (from) is sometimes written as o, which we can see in phrases like o chionn ghoirid (a while ago). This preposition lenites the following noun where possible.
An d’ fhuair sibh cuireadh bho Mhàiri?
Did you get the invitation from Màiri?
Am faca tu am preusant bho Iain?
Did you see the present (gift) from John?
An faigh thu na h-iuchraichean bho Dhòmhnall?
Will you get the keys from Donald?
When we use bho with the definite article, it becomes bhon and causes nouns which follow it to be in the dative case.
bhon uinneig sin
from that window
bhon taigh agam
from my house
bhon bhaile seo
from this town
An d’ fhuair thu litir bhon sgoil?
Did you get the letter from the school?
Chunnaic mi na h-eòin bhon uinneig.
I saw the birds from the window.
Dh’ionnsaich mi a’ bhàrdachd bhon leabhar.
I learnt the poetry from the book.
Watch as Joy explains more about prepositional pronouns in Gaelic.