This is the 2193rd most frequent Turkish word.
ondan
"From him/her/it" or "than him/her/it."
In this sentence, "ondan" means "from him/her/it." It refers to the source of the action, indicating from whom the news was received.
Ondan bana bir haber geldi.
I received news from them.
Here, "ondan" is used to mean "from him/her." It indicates the entity from which the pen was received.
Kalemi ondan aldım.
I got the pen from him/her.
In this example, "ondan" means "therefore" or "because of that." It is used to indicate the reason for an action.