Old English þancian

← Proto-Germanic *þankōną (inherited)

← Old High German dankōn (cognate)

← Icelandic þakka (cognate)

← Dutch danken (cognate)

← Old Norse þakka (cognate)

← Old Saxon thankon (cognate)

→ English thank (inherited)

→ Old English þanc (link)

→ Old High German dankon (cognate)

→ Old Norse þakka (mention)

→ Old Saxon thankon (cognate)

→ Scots thank (inherited)