My father's family is Swiss German

There were 6 brothers who came to the U.S. in something like the Mayflower about 1725 and the ship went up the Delaware river to Philadelphia which was founded October 27, 1682. So, when they arrived it had already been there over 40 years since it's founding.
Also, my grandmother (my mother's mother) who was born here to Scottish parents lived in Philadelphia in a home they owned there in 1888 when she was born there but their home burned down and she had to move back to Clydebank, near Glasgow to grow up from about age 12. But, she and all her brothers and sisters returned to the U.S. because they were already citizens from being born here as adults.

The 6 Brothers who I'm related to on my father's side from Switzerland came to the U.S. through England where they hopped a ship to get here. I can trace my relatives back to about 1580 in Switzerland to where they all lived now. Families of at least 3 to 5 to 10 children were normal back to about 1580 and then my grandfather on my father's side was the last to have 5 children. 

Most people in my family since the 1930s have had only 1 to 3 children each that married if they had children. So, as more people stayed alive, people here in U.S. started to have less children. It seems people had a lot of children up until about 1930 because some of them usually died of something. This started changing at least by 1950 when living to 70 became more normal and possible here in the U.S. In 1900 60 was really old for people because most people died before 40 then.

Now here in the U.S. if you live to be 30 often you can expect to live to be 90. On my mother's side, her mother (Scottish Side) lived to 90 and so did my mother's 2 sisters and my mother passed only months before turning 90 also. So, there is longevity on both sides of my family genetically speaking.

I have a great Grandmother who lived until 1952 or 1953 who was born in the 1850s in the U.S. My Great Grandfather was a captain in Kansas in the Civil war for the North and was born in the 1840s and passed away in the 1940s in Kansas. He owned a pharmacy in Kansas that he operated from the 1870s after the war until he sold it in 1925. He started this pharmacy by buying herbal treatments from local Native American healers of that area then in the 1870s. He was of Swiss German descent from the 6 brothers that came to the U.S. to Philadelphia up the Delaware river in a ship like the Mayflower which brought the Pilgrims only about 100 years later in 1725.