There are at least 3 published papers on at least part of the Steelman Family. I copied and pasted what is below from "Along Absecon Creek" by Sarah Ewing and Robert McMullin (1965) There seem s to be some confussion about whether Zephaniah (and there seem to be two Zephaniah Steelmans) married Rebecca Risley or Rebecca Ireland. I can scan more from the Arthur Adams Steelman Genealogy and can consult the Jim Steelman Steelman Genealogy if you want.
6. Zephaniah4 (John3, James2, Capt. Hansi). His father left
Zephaniah "one third my land joining Amos Ireland." This is the
land which was contiguous to the second tract in the 1740 deed.
The second tract is mentioned again as the first piece of land in the
1799 quit claim deed and deed of release: "all the land on the east
side of the sd Joseph Ireland's dec'd plantation & on the east side
of the division line Beginning in the line of Rebeckah Steelman . . ."
Another deed of 1810 calls this land "late the plantation of Zeph-
aniah Steelman deceased . . ."
The well-known genealogist, Dr. Arthur Adams, says in his
study of the Steelman family: " . . . Zephaniah Steelman married
Rebecca, daughter of Edmund Ireland of Absecon, as we learn from
a deed made by Edmund Ireland's heirs . . . He was a private in
the militia during the Revolution . . ." In his Adams' family
genealogy, Dr. Adams says: "Richard (son of Jonathan and Mary
Adams) born January 20, 1759 and died December 14, 1805. He
married June 26, 1784 Rebecca Ireland. She was born February 22,
1767 and died November 10, 1811. She was a daughter of Edmund
Ireland who died February 26, 1796. He lived in Philadelphia."
These deeds show that Edmund, son of Joseph Ireland and his
wife, Ruth Cordery, lived and died in Absecon, Galloway Township,
and that all of his children lived here until they were grown. Two of
the deeds, both dated April 7, 1799, unrecorded and signed by all of
his children, tell us that they were living in Galloway Township
on that date; and that Richard Adams did marry Rebecca, daughter
of this Edmund, as they signed these deeds as husband and wife.
The New Jersey Archives say that "Zephaniah Steelman mar-
ried Rebecca Risley on April 16, 1768," and this may have been
the maiden name of the elusive Rebecca. She was granted administrative papers for her husband, "Zephaniah Steelman of Galloway,"
on February 15, 1790; and an inventory made by "Edmon Ireland"
points out the neighborly good will existing in those early days.