Tonnie is a Danish, Dutch, Portuguese and Swedish given name and diminutive nickname with both masculine and feminine uses.[1] [2] [3] As a Danish and Swedish name it is used as a diminutive of Antonia in Greenland, Denmark and Sweden, but also has masculine uses.[2] As a Dutch name it has feminine used as a diminutive of Antonia in Belgium, Indonesia, Suriname, South Africa, Namibia, and the Netherlands.[3] As both a Dutch and Portuguese name it has masculine use as diminutives of Antônio, António, Antonius, Anton, Antoon, Anthonis, and Anthoon in Brazil, Portugal, Angola, Mozambique, Belgium, Indonesia, Suriname, South Africa, Namibia, and the Netherlands.[1] Notable people with the name include the following: