When did Kamon start ?

Kamon is used for family's mark to identify each other.It started heian-era(平安時代794 - 1185) Very old people such Japanese noble put kamon their many items.They put kamon mark on their car that works by cow first. I don't know truth,but it's said origin is Tomoe-mon.

Wow,that's powerful,simple mark.My favorite one.And real wheel kamon existed.It's called  源氏車 genji-kuruma "genji(源氏)" is Japanese old noble family's name.

Eight legs imagines 八正道(hatu-sho-do)(one of Buddhism's ideology).