'thank by' is not a correct and usable phrase in written English.
If you want to express gratitude for something, you can say, "Thank you for [doing something]." For example: "Thank you for helping me with this assignment."
When Senator Frank H. Murkowski of Alaska, the chairman of the Natural Resources Committee, introduced his broad energy proposal, he made sure to publicly thank, by name, the many lobbying groups who helped shape the bill.
Although he ran out of staff to thank by the third of five acceptance speeches, his dominance of the event became truly undeniable when former ASME prez/Newsweek editor and just-named NBC SVP News Mark Whitaker declared him the "new David Remnick".
Time does not allow me to thank by name everyone who made this progress possible.
We welcome the work done, first and foremost, by the rapporteur, whom we should like to thank, by the Conciliation Committee as a whole and by the Commission, which was sufficiently open-minded on the compromise text as to incorporate almost all of Parliament's proposed amendments.
Both cytokines are known to enhance release of B cell activating factor (BAFF; also known as BLyS, TALL-1, zTNF4, and THANK) by monocytes [ 62].
On opening night, Artie is assailed by self-doubt, but he is thanked by the cast for his leadership, and he thanks them for trusting him.
For this achievement he was thanked by Congress and promoted.
Not once have I been thanked by the flight attendants.
They were met and thanked by Armed Forces Minister John Spellar who said: "The country is proud of you.
Charles Meng: The best part of my job is being thanked by our grateful clients.
My proudest achievement at work is... every time I'm thanked by a customer or colleague.
