I'm not related. I'm just trying to help you find some info. Lee's post is old but you might be able to contact him anyway. As you can see he has several generations going back. Here's some more info that Lee does not have.
Some of these records you can look at for free at labs.familysearch.org and Ancestry.com. For those you cannot see for free I suggest checking with your local libraries to see if they have Ancestry or Heritage Quest.
The 1930 census shows Harry and Natalie Gatter with sons Robert and Richard living in Philadelphia. The record indicates Natalie was born in Poland and she immigrated in 1904. Harry was a city policeman.
The 1900 census shows Harry C. Gatter, born April 1861; wife Lottie, born Aug 1851 in PA (should be 1871 based on the age), parents born in NJ. They were married ten years and living in Philadelphia. Based on the ages of some of Harry's oldest children it is probable he was married before. I could not find Harry in the 1880 census.
The 1870 census has a Harry Gatter 7, Emma Gatter 11 and Eliza Gatter 15 living with A. K. Miller in Philadelphia.
The 1860 census shows an Eliza 4 and Emma 4/12 with William 30 and Eliza 26 Gatter again in Philadelphia. My guess is they are the same Eliza and Emma above. William seems to have married a Sarah by 1870 and may have left his children for someone else to raise.
The 1880 census shows Joseph P. Cliver 43, Sallie A. 41, Frank H. 11, and Lottie 9 living in Philadelphia. The parents were born in NJ.
The 1850 census shows Joseph P. Cliver 12 living with Anna Cliver 46 living in Medford Twp., Burlington Co., NJ.
An index of Civil War pensions lists the widow Sarah Cliver getting a pension through her husband Joseph P. Cliver in 1890. He served in Company A, 23rd NJ Infantry Regiment. The application number is 482.376 and certification number is 356.652. If you are interested in getting the file apply to the National Archives in Washington, DC. It's not cheap but it might contain very interesting genealogical data especially since the widow had to prove she was actually married.
I could not find Natalie in the census before 1930. I did find two records that were interesting:
On the ship "Finland" which arrived in NY on Nov 22, 1905 are listed Anna Koslowska 30, Fanina 5 and Natalia 2. They were Polish from Docryznkowo (sp) and headed to Philadelphia. The trip was paid for by the husband Wojciech Koslowski of Philadelphia.
The closest I could find for the husband immigration was a Wojciech Kozlowski 26 from Lodz, Poland arriving in Baltimore on May 26, 1904 on the Hannover. He was headed to Philadelphia. The trip was paid for by his brother-in-law Wojciech Kieminki of Philadelphia.
Depending on how much you research you want to do there are several avenues to take. I suggest getting Natalie's death certificate and obituary to make sure of her parentage. The same would be true for most of the other people in your family tree. The Philadelphia City Archives and the Historical Society of Pennsylvania might be able to help you when you get stuck.