Did a little research and found the following information regarding "On My Father's Side" and "On My Mother's Side":
"On My Father's Side" was copyrighted on 9/21/1990, as written by John L. Reinhardt.
"On My Mother's Side" was copyrighted on 3/13/1992 by Felecia Shiflett Music, with words & music by: Jan Buckner, John Turner, Felecia Shiflett.
There is NO copyright for "On My Father's Side" by Felecia Shiflett Music - - although they claim credit for the song with BMI.

If you look over the various lyrics listed above for the two songs, it appears to be very clear that "On My Mother's Side" is nothing more than a blatant rip-off of "On My Father's Side".

If you'd like to write to Felecia Shiflett Music for the lyrics and sheet music for "On My Mother's Side", you can reach them at:

Felecia Shiflett Music
48 Stone Mill Walk
Griffin, GA. USA 30224-5455