Is hostname sent to VPN server?

Is hostname sent to VPN server?
I’m using Ubuntu + Whonix-gateway, and set up VPN on top of Tor, to avoid the websites detect the fact of Tor usage. The VPNs are public and free to download .opvpn and use, but all maybe from the same company, so it can detect it’s me who is using these VPNs (so they will also know the websites I like) if my personal information like my hostname is being sent to the VPN servers. I guess some of you aware of it or VPN runners have ever received hostname by watching the log or something else?