Dietrich
‘German masculine name and surname, literally folk rule’
Lexical development traced from the Tamil root:
O.H.G. theodric < theuda ‘folk, people’ + rihhi ‘rule’ < Proto-G. rikja ‘rule’ < rik < reg- < Tamil aracaṉ
Dietrich
English words derived from Tamil aracaṉ connoting 'rule'