These family crests (In Japanese, KAMON) are called 'Mokko-Mon' in Japan.
Goka is included in the Mokko.

Chinese flower
mokko

Square mokko
in circle		 Square mokko Butterfly-shaped
Goka		 Mokko Mokko in hut

Mokko Mokko
in a circle		 Mokko in
rice cake		 Pile of
three mokko		 Asano hawk
feathers in a goka

Oda Nobunaga Chinese Flower
in Goka		 Trisected
mokko		 Butterfly-shaped
Goka		 Hotta Mokko

Butterfly-shaped Goka :
This KAMON design, mimicry in butterflies, is variation of 'Goka-ni karahana' and is called 'Goka ko-cho' in JAPAN.

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