My brother uses sentences like that a lot:
There were some women who look pretty.
By that he means:
There were some pretty women.
I feel like native English speakers don't use the word "Who" like that. From my study, I think this is the correct way to use a conjunction word:
The women who were there look pretty.
I think my brother is influenced by our mother tongue language (Arabic) because in Arabic, the word "Who" is used like what he said and that sounds too normal and understandable.
He disagrees with me and he thinks that he listened to sentences like that from native speakers and that's why he uses the word "Who" in that way. He says it's like the following sentence:
Those are the ones who look pretty.