Thanks!
If you install the CoinPayments adapter extension you can offer wallets backed by CoinPayments.net. CoinPayments.net offers a number of online wallets, including Etherium.
https://www.dashed-slug.net/bitcoin-altcoin-wallets-wordpress-plugin/coinpayments-adapter-extension/
This extension is available for free to subscribers (you don’t have to pay for membership for this particular plugin).
A direct adapter to the Etherium wallet does not exist at this time. As the CoinPayments extension is new, please report any issues or feedback at its support area:
https://www.dashed-slug.net/projects/wallets-cp/
regards,
Alex