Electrum actually released this statement about Electron Cash
electrumcash.org, with a modified version of our logo. The use of our
name and logo constitutes a trademark infringement.
We have never enforced our trademark against altcoin versions of
Electrum (such as Litecoin, etc), because we consider that users of
these altcoins are well aware of the distinction between Bitcoin and
their coin, and that they cannot be harmed by that confusion. However,
we do not agree with the use of the Electrum name in the context of a
Bitcoin fork, because it suggests that we endorse that fork, and that
we also endorse that wallet.
We reserve ourselves the right to use the name Electrum for a Bitcoin
Cash wallet, should we decide to publish one in the future.