Namibia

…
(3) The following persons shall be citizens of Namibia by marriage:
(a) those who are not Namibian citizens under Sub-Article (1) or (2) hereof and who:
(aa) in good faith marry a Namibian citizen or, prior to the coming into force of this Constitution, in good faith married a person who would have qualified for Namibian citizenship if this Constitution had been in force; and
(bb) subsequent to such marriage have ordinarily resided in Namibia as the spouse of such person for a period of not less than ten (10) years; and
(cc) apply to become citizens of Namibia;
(b) for the purposes of this Sub-Article (and without derogating from any effect that it may have for any other purposes) a marriage by customary law shall be deemed to be a marriage: provided that nothing in this Constitution shall preclude Parliament from enacting legislation which defines the requirements which need to be satisfied for a marriage by customary law to be recognised as such for the purposes of this Sub-Article.
… (Art. 4)

(1) ...
(f) No persons shall be compelled to give testimony against themselves or their spouses, who shall include partners in a marriage by customary law, and no Court shall admit in evidence against such persons testimony which has been obtained from such persons in violation of Article 8(2)(b) hereof.
... (Art. 12)

(1) Men and women of full age, without any limitation due to race, colour, ethnic origin, nationality, religion, creed or social or economic status shall have the right to marry and to found a family. They shall be entitled to equal rights as to marriage, during marriage and at its dissolution.
(2) Marriage shall be entered into only with the free and full consent of the intending spouses.
(3) The family is the natural and fundamental group unit of society and is entitled to protection by society and the State. (Art. 14)

(1) Children shall have the right from birth to a name, the right to acquire a nationality and, subject to legislation enacted in the best interests of children, as far as possible the right to know and be cared for by their parents.
… (Art. 15)

The State shall actively promote and maintain the welfare of the people by adopting, inter alia, policies aimed at the following:
(a) … the Government shall seek, through appropriate legislation, to provide maternity and related benefits for women;
… (Art. 95)