ytterbium gallium garnet 釔鎵石榴石。
又如，遊戲英雄無敵中有地名ygg-chall：
This is one of the few towns that remained intact after the dark elves took over the caves and labyrinths of ygg - chall
在黑暗精靈占領了易格池沃的巖洞和迷宮後，這裏是少數幾個保存完好的城鎮之壹。