Thirty-nine UK expats in the Breisgau-Hochschwarzwald region, in southern Germany, have applied for citizenship since last June’s referendum.
Dorothea Storr-Ritter, head of the area’s district authority, congratulated those who have become naturalised German citizens.
She told local newspaper Badenische Zeitung: “You are an incredible asset.
“Because of you, our country is becoming more diverse and interesting.”
UK expat Nick Procyk, 58, said applying for a German passport was a “safe bet” due to the uncertainty surrounding Brexit talks.
Mr Procyk, who has lived in Germany for 30 years, added: “This is also a bit of protest against the stupidity of the British.”
And Mary Colon-Forster, 61, told the newspaper she was “pushed” into applying for German citizenship by Brexit.
Mrs Colon-Forster, who described herself as a “proud” Briton, has lived in Germany for four decades and is married a German citizen.
“I feel driven into a corner by Theresa May and my countrymen. Brexit was the push.”
Earlier today, Brexit Secretary David Davis said divorce talks with the European Union would be pushed until the 11th hour.
He told the House of Common’s Brexit Committee: “It’s no secret that the way the union makes its decision tends to be at the 59th minute of the 11th hour of the 11th day and so on.
“And that is precisely what I would expect to happen… It will be a lot of pressure, very high stress, very exciting for everybody watching.”
But Mrs May later appeared to contradict Mr Davis, saying she was “confident” a deal would be secured in time for MPs to vote on it.
The Prime Minister said: “The timetable under the Lisbon Treaty does give time until March 2019 for the negotiations to take place.
“But I am confident because it is in the interests of both sides… that we will be able to achieve that agreement and that negotiation in time for this Parliament to have the vote that we committed to.”
Officials in the Department for Exiting the European Union then issued a statement clarifying Mr Davis’ comments.
A spokesman said: “We are working to reach an agreement on the final deal in good time before we leave the EU in March 2019.
“Once the deal is agreed we will meet our long-standing commitment to a vote in both Houses and we expect and intend this to be before the vote in the European Parliament and therefore before we leave.”
Downing Street insisted Mrs May had “full confidence” in Mr Davis, and that the Brexit Department and No10 were “totally aligned” in their approach.
Additional reporting by Monika Pallenberg