I found this entry in the marriage index at the New Jersey Archives website.
William Wonderlin married Elizabeth Maquet in Mt. Holly on December 1, 1859. The record number is BK C-2, Page 189. This would be page 189 of the Burlington County marriage register that contains December 1859. It should have the name of the fathers and the given name of the mothers but not their maiden names.
I found these names at the death index at the New Jersey Archives.
Maple and Myrtle Wonderlin, twins, age 2 months, died July 15, 1883 in Burlington City. The certificate numbers are 1883-84-12-W11 and 11883-4-12-W12. These certificates should have the name of the father and maiden name of the mother. I have not seen anything about these twins prior to finding this.
Charles Wonderland, age 8 months, died in Chester Township in 1882. Certificate number 1882-82-10-W2. This is another new name for me. I suspect his parents were Theodore Scott Wonderland and Sarah Ellis Matlack, my great grandparents, who lived in Moorestown, Chester Township.
This is the website for the New Jersey Archives.http://www.njarchives.org/links/databases.html
Click on Searchable Database to find the marriage and death indexes. You will also find instructions on how to order records.