The Ahlemeyers originally hailed from Westfalia.As a result of the 30 year war (1618 to 1648) most churches and church records were destroyed - we have tried without success to find records of earlier Ahlemeyers.
Also as a result of the war, Westfalia was split up and one part became a Prussian province.All people under Prussian governance had to convert to the Protestant religion.
The Catholic Ahlemeyers continued to live in the Paderborn area. There is even a street named after a great-great-uncle of mine who made it to monsignor in the Church. Another great-uncle started a textile manufacturing company in 1828. My great-grandfather founded the first savings bank in Paderborn. The regional museum in Paderborn (Heimatmuseum) has some information on the Ahlemeyers in Paderborn.
To the best of my knowledge, I'm the first Ahlemeyer of the Catholic branch to have moved to the States. Other than my son, there are no males left.
I know very little about the Protestant Ahlemeyers.I believe that they lived in and near the city of Bielefeld and were merchants and farmers. I also believe that all US Ahlemeyers are from the Protestant branch.
I lived in Germany until age 19 and also again for a few years in the late sixties.The name "Ahlemeyer" is quite unusual even in Germany.
BTW, the first "e" in Ahlemeyer is pronounced. In Germany you would be Mr. Ah le meyer with the emphasis on the second syllable.