Yin-Yang is not a dutch word. I wrote it before, the "Y" we don't use. We have words start with IJ like IJs (ice
Because I loved Taiji and the Tao I take for the Y the Yin-Yang. It stands for harmony in everything. Good/Bad; Black/White; Strong/Weak; Right/left etc. It let us see that we live in harmony even we don't see it directly.