If your male ancestor died before his wife and owned real property at the time of his death, there might have been a deed drawn up by the heirs after the widow died to transfer property to new ownership. If the property was being transferred among the family of the widow, the usual mechanism would have been a quit claim deed. If the property was being sold outside the family, a warranty deed was the usual legal instrument used.
A quit claim deed is one where the grantors are giving up their claim to the property. A warranty deed is one where the grantors are guaranteeing to own the property being transferred and is usually used for transfers out of the family.
No matter which deed is used, it may not mention the widow or her death at all.