Product : Red Hat, RHEV/3.6, RHEV
Feature : VM Templates, Deployment, Management
Content Owner:  Roman Macek
Summary
No (native);
Yes (with Vendor Add-On: CloudForms)
Details
There is no integrated functionality in RHEV that allows you to deploy a multi-vm construct from a single template.

CloudForms supports tiered VM Templates and a ordering portal to deploy them.
This is a Fee-based Add-On; Details - https://www.redhat.com/en/technologies/cloud-computing/cloudforms for details.