the latter
后 · 6 strokes
Depicts a queen mother (母) giving birth to her heir (𠫓). Based on the original meaning "heir to the throne". The meaning later expanded to "ruler", "successor", and "after".
者 · 8 strokes
Origin unclear. 耂, which is a pictograph of a tree with paper mulberry leaves (original form of 楮), represents the sound.