What i'm saying unless I mis-understood you message is that each server needs to have its physical name in DNS
The virtual name of the cluster also needs to have a DDNS record in DNS
When it comes to EV you would follow the Installation guide that comes with EV on how to install EV on a MS Cluster.
These include setting up the necessary virtual resources
Set the Vault Site Alias
Computer Alias
Set a DNS Alias
For the failover node there is a difference when setting up EV because you specify that the node is a failover node, This is done during the configuration of the failover node after installing EV
Not sure what version of EV you have but on EV8 SP3 the steps start on Section 6 which is page 229 of the Installing and configuring guide that comes with the EV