I am using mxlinux without systemD yet for some reason I see the following systemD processes.

/lib/systemd/systemd-udevd

/lib/systemd/systemd-login

/sbin/cgmanager --daemon -m name=systemd

Can anyone tell me why ?

Because MX uses a hybrid init (did I just make that up?). By default it uses sysv init and systemd-shim, all of systemd is there but inactive so to speak. Any programs that look for systemd or need it as a dependency (or is marked as a dependency because of lazy packagers) should work as expected. Do not think that MX is systemd free because it is not, if you want that within a Debian framework then use Antix or Devuan.
https://mxlinux.org/wiki/system/systemd/
https://mxlinux.org/blog/about-mx-19-and-systemd/

No. That does not make sense. Why use a different Init system if any part of the system is still dependent on System D? You might as well only use system D. I asked this question on the mxlinux forum and they removed it. Also if what you say is true the system should bring to the users attention that system D is required before using as mxlinux says it does not use system D.

Can anyone identify what the process are used for ? When I kill them I see no change in operation.

Whether it makes sense or not, it's true that MXLinux allows systemd. If that is unacceptable to you, changing distro to one that doesn't is probably a better choice than trying to remove it.

AntiX is a Debian derivative which is explicitly systemd-free (see about page), and focused on lightweight WM desktops.

Devuan's defining feature is that it is Debian without systemd (see first paragraph on homepage). It can do everything Debian does (except run systemd and software that is too tightly coupled to systemd), so is a reasonable choice if you want an Xfce-based system.

For others, see nosystemd.org - there's a couple dozen distro icons/links at the bottom.

MX does not say it does not use systemd (note - no capital S or D)

Yes, Mxlinux does say they use Sysvinit by default and you have the option to use systemd when you boot from grub if you want to change to systemd.

See their forum response.

https://forum.mxlinux.org/viewtopic....5da7d1#p496908

Why are they usin any systemd process at all ?

Because systemd is a lot more than just an init nowadays. So they have systemd installed and enabled, it's just not what handles init.

What else does systemd handle on a mxlinux system that by default uses sysinit ?