Tenn. Code § 36-3-101 : DOMESTIC RELATIONS — MARRIAGE — LICENSE —3-101 - Prohibited degrees of relationship

Marriage cannot be contracted with a lineal ancestor or descendant, nor the lineal ancestor or descendant of either parent, nor the child of a grandparent, nor the lineal descendants of husband or wife, as the case may be, nor the husband or wife of a parent or lineal descendant.