Here are some examples of usage from
FGB on ó.
Fuair sé litir óna mhac, he got a letter from his son.
An fear ónar sloinneadh iad, the man from whom they got their name.
Óna athair a thug sé sin, he took after his father in that respect.
Ó chroí nó ó bhéal, from the heart or only from the lips.
Ó dhúchas agus ó shinsearacht, by birthright and seniority.
Ná creid uaidh é, don't believe it from him.
Níor thuig mé focal uaidh, I didn't understand a word he said.
Comhairle uaimse duit, let me give you a bit of advice.
Uaidh féin a chuala mé é, it was from himself I heard it.