Pronoun:

qui

Function:

Subject, indirect object (person)

Translations:

who, what, which, that, whom

Pronoun:

que

Function:

Direct object

Translations:

whom, what, which, that

Pronoun:

lequel

Function:

Indirect object (thing)

Translation:

what, which, that

Pronoun:

dont

Function:

Object of de
Indicate possession

Translation:

of which, from which, that
whose

Pronoun:

où

Function:

Indicate place or time

Translation:

when, where, which, that