Hello,
It's hard to come up with some name that fits well with the hawk and ocular metaphor. I like what the ELK stack has, they have units called beats (it evokes some periodicity to me and also it sounds like a bee). imho, "bee" is the best name for a lightweight agent that collect metrics, but it doesn't work for us.
What about having multiple agents called "ocular" or okular. Like OpenShift Okular, WildFly Okular, ${you name it} Okular? Although, flying hawk w/ multiple oculars imply the pull architecture. Hawkular X Agent isn't bad, but it's too long and too enterprisy, worse is only Red Hat Hawkular OpenShift Agent :]