Seibert \se(i)-be-rt\ as a boy's name is a variant of Seabert (Old English), and the meaning of Seibert is "shining sea".

The baby name Seibert sounds like Sebert and Seabright. Other similar baby names are Shubert, Aubert, Abert, Ebert, Fabert, Hobert, Hubert, Liberto, Obert, Osbert, Robert, Saber, Schubert, Seabury and Sewerd.