Bip39. Entropy values has to be sourced from a powerful source of randomness. This means flipping a good coin, rolling a good dice, sounds measurements and many others. Will not use phrases from textbooks, lyrics from music, your birthday or steet handle, keyboard mashing, or anything you believe is random, https://whatisadirectory.com/listings13086300/bip39-mnemonic-generator-https-linktr-ee-bip39-fascination-about-bip39-word-list-pdf