In the first part "Mnemonic" of https://dcpos.github.io/bip39/, "Ethereum" is not in the "coin" field list. how do you generate the Ethereum BIP32 Root Key?

I hope you will find that the path is consistently set to m/44'/60'/0'/0. The coin path for ether is 60 and not 66 as can be found on https://github.com/satoshilabs/slips/blob/master/slip-0044.md, and the testvector was derived by combining https://dcpos.github.io/bip39/ to generate a private key and then https://www.bitaddress.org it all to hex format