Globally, Muižnieks (Muižnieks , Муйжниекс ) is an extremely rare unknown gender first name. Much more frequently, Muižnieks is the last name as well as the forename.
Muiznieks, and Muižniece
Toms, Eduards, Gundars, Ronalds, Roberts, Rainers, Kaspars, Matīss, Oskars, Valdis, Emīls, Jānis, Dāvis, Reinis, Raivis, Kārlis, Māris, Modris, Peter, Mikus, Valters, and Mārtiņš
, Муйжниекс 
) is an extremely rare unknown gender first name. Much more frequently, Muižnieks is the last name as well as the forename.