Probably also Neodymium and Praseodymium are two of them, for their weights are 143.6, 140.5.
"Occult Chemistry" by Annie Besant and Charles W. Leadbeater
The atomic weight of praseodymium is 140.5.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4" by Various
Neodymium and Praseodymium discovered by Welsbach.
"The Progress of Invention in the Nineteenth Century." by Edward W. Byrn
The two cerium isotopes 147Ce and 148Ce wer discovered by Hofman and Daniels at Los Alamos Scientiﬁc Laboratory in 1964: Some Short-Lived Isotopes of Cerium and Praseodymium .
Discovery of the Cerium Isotopes