Thadee \th(a)-dee\ as a girl's name is a variant of Thaddea (Aramaic), and the meaning of Thadee is "heart".

The baby name Thadee sounds like Thaddie, Thadda and Thada. Other similar baby names are Thandee, Kadee, Cadee, Hadee, Jadee, Sadee, Shade, Shadoe, Shadae, Thandie, Thandey and Thalie.