Most of us have a policy respecting the privacy of living people by not discussing them on public message boards or mailing lists (e.g., most people would rather not have it broadcast on the internet that one of their parents was illegitimate).
SIAS is a very rare name, so I would suggest the best way to find your kin is to simply telephone every SIAS in the appropriate locations.I just did a search on SIAS in California at
and there are only 66 SIAS in California.There are only 42 in West Virgina and 34 in Ohio -- and only two in Akron.There are only eight INGERSOLLs in Akron, and I would telephone them, too.Some diligent phoning should turn up your kin.
I started doing genealogy four years ago, and the first thing I did was a telephone campaign.It took two months, but I found every living descendant of both sets of my grandparents -- and their surnames were MUCH more common than SIAS.
My experience was that it's best to telephone on the weekend and in the afternoon.Be extremely polite and DON'T mention that anyone was illegitimate, unless they mention it first.Illegitimacy may not matter to many of us, in this day and age, but it still matters to some, especially elders, who will be your best source of information -- unless you threaten to disclose what may be, for them, a deeply held secret.
In fact, my suggestion to you is that you ask GenForum to remove your query -- and this reply of mine -- or you may find you have burned your bridges as far as making friendly contact with your kin is concerned.