English
Kaplanian
From Kaplan + -ian.
Today it means
adj Of or relating to Mordecai Kaplan (born Mottel Kaplan; 1881–1983), Lithuanian-born American rabbi, writer, Jewish educator, professor, theologian, philosopher, activist, and religious leader who founded the Reconstructionist branch of Judaism along with his son-in-law Ira Eisenstein.
Language periods are conventional ranges, not dates for this word.
Etymograph / Kaplanian