デン, テン, との, どの, て, どん
Mr., hall, mansion, palace, temple, lord
JLPT2 G7 S13 F1199
Variant form# of 展 (place the buttocks atop an object) + 殳 action indicator → place the buttocks on an object in settling upon it → *rear* (← rear end). Also, *palace* and *hall* (← sit on a throne) → *lord*. との refers to a place name, that is, と as in 大和 (やまと) and の as in 名 (な・の), which supplied names for high-ranking families in ancient Japan. *Mr.*, *Ms.*, *Mrs.* and *Miss* are via extension from "lord" in the sense of being honorifics.
[Full Kanji Etymology List]