They were aware of students participating whom had not participated in the past.
From the desmoinesregister.com
The first employee they hired was Jeff Johnson, whom Knight had met at Stanford.
From the usatoday.com
Figure out how much you owe, to whom and on what terms, and start paying it off.
From the washingtontimes.com
The Daniels have five children, three of whom were adopted, their attorney said.
From the sacbee.com
Jayme, with whom Chuck has started a public service project, is his twin sister.
From the washingtonpost.com
She then went on to date marry actor Ben Affleck whom she has two children with.
From the sacbee.com
Students for whom English is a second language also tend to fall further behind.
From the charlotteobserver.com
The other side of the readership is people for whom Real Simple is aspirational.
From the time.com
He became known as a healer for young women, some of whom fell in love with him.
From the time.com
More examples
The pronoun who, in the English language, is the interrogative and relative pronoun that is used to refer to human beings.
WHOM (94.9 FM, "94.9 WHOM") is an American radio station which airs an adult contemporary format. It transmits from atop Mount Washington in New Hampshire and has a broadcast area of 5 states and 2 Canadian provinces. ...
What person or people; which person or people, as the object of a verb; What person or people; which person or people, as the object of a preposition; Him; her; them (used as a relative pronoun to refer to a previously mentioned person or people.)
Is commonly used as the object of a preposition in a clause that it introduces <she is someone for whom I would gladly work>. However, who is commonly used to introduce a question even when it is the object of a preposition <who are you going to listen to?> <who do you work for?>.