Dhcpcd-6.8.2-armv7l |link| Link
If you see an unknown device with this ID on your network, it is likely an Android phone or an IoT device (like a smart camera or light).
You might see this in:
# Add to /etc/dhcpcd.conf timeout 15 # For Realtek ARM Ethernet controllers: option interface_mtu dhcpcd-6.8.2-armv7l