The image of a family crest which represents "kikyo or kikyou or 桔梗 in kanji " meaning "bell flower" in English .the "Bellflower Seal" (桔梗紋 kikyōmon?) is the crest (kamon) of some clans like the Toki clan,the Akechi clan.
For more info about Mon(Japanese emblem),see here:
en.wikipedia.org/wiki/Mon_%28emblem%29 家庭冠鐘花 balloon flower、bell flower、crest、emblem、Flor、flower - generic、kamon、kikyo、kikyou、mon、Templates for Embroidery、yamachem 氣球花、鐘花、波峰、徽、花、花 - 通用、家族徽章、桔梗、桔梗、我的、刺繡模板、Yamache米 資料來源:openclipart ( https://openclipart.org/ )