2,180. A Shetuki and an Asufi

Hilchos Issurei Biah 15:12

If the child’s mother wasn’t asked about his lineage before she died, or if she had congenital deafness, was unable to speak or lacked mental competence, or if she says that she was intimate with a certain mamzer or a certain Gibeonite – even if the man in question concedes – in all of these cases we presume the child to be a doubtful mamzer. We assume that just as she was intimate with the man who conceded, she may have been intimate with others. Such a child is called a shetuki (“silenced”), referring to one whose mother is known but whose father is not confirmed.

Hilchos Issurei Biah 15:13

A child found in the marketplace is called an asufi (roughly, a foundling). He is considered a doubtful mamzer because we don’t know his lineage.