家紋を英語でなんと言うか？

crest, coat of arms が紋章で、family crest, family coat of arms で家紋です。2:26 Mr. Trump also has a custom theater, custom designed pillows embroidered with the Trump family crest which designed to coordinate throughout including the headrests on the aircraft. トランプ家の紋章

Mr. Trump's 757
https://www.youtube.com/watch?v=W7NO_Jn3_rs  1:14 they say it was actually Prince Albert who made the case known in the 19th century, choosing scarlet red as the most famous color in his family coat of arms. 財務大臣が持つ赤いかばんのザクセン＝コーブルク＝ゴータ公子がかばんに家紋の紅の赤を採用し19世紀に世に知らしめたことに由来するといわれる。

練習問題解答
a-2189 the family's crest
a-2997 family crest
b-4788 coat of arms