motherkin

noun2

1. •
   (old-fashioned) Fond term of address for one's mother.
2. •
   (old-fashioned) Fond term of address for a woman older than the speaker

   • "Motherkin," I answered, "what I mean is that I would sleep until I wake, for I have come a prodigious distance and have last slept in the woods […]" — 1902