A minor who exercised the right of refusal, a relative of the second degree, and an ailonis are not entitled to a kesubah, or usu-fruct, or sustenance, or worn-out articles. But if from the outset, he married her knowing that she was an ailonis, she is entitled to a kesubah.  A widow [married] to a Kohen Gadol, a divorcee or a woman who had performed chalitzah [married] to an or-dinary Kohen, a mamzeress or a Nesinite [married] to a [regular] Jew, [and] the daughter of a [regular] Jew [married] to a Nesin-ite or to a mamzer are entitled to a kesubah.