Muhammadu Ndayako wanda aka fi sani da Baba Kudu (Haihuwa:1884 - Rasuwa:1966) shi ne Etsu Nupe na 9, daga shekara ta 1935 har zuwa rasuwarsa a shekarar 1962. An haifeshi a gidan masarautar Bida. Shi ɗa ne na shida ga Etsu Nupe Malam Muhammad Makun wanda shi ɗa ne ga Etsu Nupe na uku, Umaru Majigi. Muhammadu Ndayako ya kasance kawu ga Etsu Nupe na 13, Yahaya Abubakar. Etsu Ndayako ya yi shekaru 26 yana mulki daga (1935 - 1962), haka kuma a matsayin dansa Etsu Nupe na 12. Umaru Sanda Ndayako ya yi shekaru 28 yana mulki, kasancewarsa mafi dadewar uwar garken sarautar. https://www.dailytrust.com.ng/meet-the-royal-ndayakos-of-bida-262995.html https://gamjimembersassociation.com/index.php/2019/06/01/remembering-the-12th-etsu-nupe-late-hrh-alhaji-dr-umaru-sanda-ndayako-cfr/ https://thenationonlineng.net/ten-years-of-the-13th-etsu-nupe/