I developped the first MySQL-Front 1.x, back in 2001 up to 2003. I stopped developing it due to building my house, getting children and making wedding. Then, in 2004 if I recall right, Nils Hoyer paid me for the right to use the name "MySQL-Front" for his own clone. He made a shareware application with his own code in the same language (Pascal/Delphi), and had several problems with MySQL which is mentioned on Wikipedia. Some years later, not sure when exactly, Nils stopped developing MySQL-Front.
In 2007, I took my old sources from 2003 and put it on SourceForge. As I sold the name MySQL-Front, I was in need for a new name. So I asked my colleagues. The proposals were mostly unusable, I tell you. My colleague Daniel was a "fan" of Heidi Klum, a german model, and so he mentioned HeidiSQL . Yes, damn me for using that name. I only was impatient with the unimportant task of finding a name, as I wanted to start coding, so it was HeidiSQL in the end. Well, and here we are, in 2015, still OpenSource.