surname Jin; surname Kim (Korean); Jurchen Jin dynasty (1115–1234)
Phonosemantic compound. 王 and 吕 represent the meaning and 今 represents the sound. 王 depicts a metal axe and 吕 depicts two metal plates.
《說文》：“金，五色金也。黄為之長，久薶不生衣，百鍊不輕，从革不違。西方之行，生於土，从土，左右注象金在土中形，今聲。，古文金。”