Still working on Maggie Sterling's daughter - Helen Keogh

It has been awhile since I posted anything about Maggie Sterling, who is the daughter of my great grandfather's sister ( or my first cousin 2X removed).  If you recall, she married a man named Thomas Keogh in 1898, and they had a daughter Helen in March of 1900.  Margaret then passed away suddenly on 17 Jun 1900 - Helen was three months old.  They are all listed in the 1900 census living in Jersey City with Maggie's parents: John and Mary O'Dea Sterling.  In 1910, Helen is living with her grandparents and Maggie and Thomas are both no where to be found.

Later I found that Maggie had died, and even later than that, I found that Thomas had remarried and become a Jersey City Fireman - rising to the rank of Captain.  Then in my post of June 16, 2014, I had found Maggie's grave with this marker:

Ah yes, I can see it's all coming back to you now.  At the time I was wondering who Joan M Zaremba was and why she is buried with Margaret Keogh?  Well, just the other day I found my answer in ancestry.com. Where else?

When I found this headstone, I ran Joan M Zaremba in ancestry.com and could only find her in the Social Security Death Index, which gave a date of birth and death. DUH, well I knew that.  Well the other day, I tried again, and found her in the US Social Security Applications and Claims Index 1936 - 2007, which is exactly what is says, it is an index.  But it gives information that the person applying for a social security account would have to submit.  Here it is:

See the part where it lists Father's Name: William Willard, the next one is Mother's Name: Helen Keogh.  Holy Mackerel, Helen Keogh - This could explain why Joan Zaremba (if you look up top it gives an alternate name of Joan Mar Zaremba - she was not married when she signed up for Social Security), is buried in the same plot with Maggie Keogh.  Apparently at some point, Helen married William Willard, and had at least one child, who recently passed away.

So now I have some more research to do at the State Archives.  Marriage records, wills, etc...  I also found a tree on line with Helen Willard and her husband, and I sent a message to the owner of the tree.  Hopefully, he will e mail me back with some info.  But for now, as usual, I am waiting for a response.