Below you can find the Once commonly eaten on church holy days this fish has a name from english & dutch words for holy flatfish Jeopardy Words Answer. The answer to Once commonly eaten on church holy days this fish has a name from english & dutch words for holy flatfish has 7 letters. This clue belongs to the Word & phrase origins category and is part of Jeopardy Word Level 850. If you scroll near the bottom you will find other clues and answers part of level 850