You are correct. 金子 can be read as “kaneko”, but that’s actually a surname and place name. “Kinsu” is a gold coin. I got the two swapped.

Oof. The reading for names will always get me. Still worth knowing the name reading!

Google maps has it showing up in a bunch of business names, too.

Seems to have been a bit of confusion in several directions here, but just to clarify: in modern usage 金子 is read only as Kaneko, and is a very common surname. The "kinsu" reading is archaic; a typical native speaker may never have heard of it.

That one sounds like Chinese word with hallucinated Japanese usage. 子 is IIUC casually used to mean "little ___ things" in Chinese, but same isn't the case with Japanese; 金子 is used as a somewhat discrete way to refer to an envelope of cash.