Yes you may have a " direct relative" cosponsor.
However, the cosponsor must still be able to maintain an income that is at or above 125% of the poverty level. this "could" be a problem if that person is on social security.
Do consult with an experienced immigration attorney for guidance.
The only relative that satisfies the requirements for the 601 waiver is permanent resident or US citizen spouse or parent. And yes a relative can be the sponsor on the 129 - your fiancé should be that sponsor though.
The answer provided here is general in nature and does not take into account other factors that may need to be reviewed for a more precise answer. You should consult with an immigration attorney before taking any action. The answer here is not intended to create an attorney-client relationship.
I agree with my colleague that the waiver can only be based on a US citizen or lawful permanent resident spouse or parent. Unless you have a US citizen or permanent resident parent, the fiancee visa route is not the way to go. This should be taken into consideration first before the issue of spsonsorship. There are other considerations here that merit a private consultation with a llawyer - by phone, skype, or e-mail. An important consideration too for Filipinos is whether you were previously married in the Philippines (remember, there is no divorce in the Philipines and it would be necessary to go through the process of annulment before you could be petitioned as a spouse).
Madrid Crost Law Group - (888) 466-4478; e-mail: email@example.com; skype: usvisalaw 10 S. La Salle Street, Suite 3320, Chicago, IL 60603 Please consult with a licensed immigration professional to provide you with a thorough legal advice. This response is not a substitute for specific legal advice and it should not be construed to create an attorney-client relationship. Please help stop notario fraud. Please visit and share this site: www.stopnotariofraud.org.