Help with Margaret Sullivan, New Orleans 1823 about

Question

She came from Ireland, related to Emma Clementa (Sullivan-P)eterson) Etter, born in New Orleans about 1860, died in Washington, DC about 1918.

Answer 1

Were you saying Margaret Sullivan was born about 1823 in Ireland or she came to New Orleans in about 1823?

How were the two women related?

Apparently, Margaret Sullivan was a very common name. I found the following, but would have no idea if any of these were the correct Margaret:

name:     Margaret Sullivan
event:     Immigration
event date:     1848
event place:     United States
gender:     Female
age:     25
country of origin or nationality:     Ireland
ship:     R N Parker
estimated birth year:     1823

Citing this Record

"United States, Index to Passenger Arrivals, Atlantic and Gulf Ports, 1820-1874," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KDR8-2X4 : accessed 10 Feb 2013), Margaret Sullivan, 1848.
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name:     Margaret Sullivan
event:     Immigration
event date:     1850
event place:     United States
gender:     Female
age:     27
country of origin or nationality:     Ireland
ship:     Urarua
estimated birth year:     1823

Citing this Record

"United States, Index to Passenger Arrivals, Atlantic and Gulf Ports, 1820-1874," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KDR8-2XN : accessed 10 Feb 2013), Margaret Sullivan, 1850.

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name:     Margaret Sullivan
event:     Immigration
event date:     1849
event place:     United States
gender:     Female
age:     26
country of origin or nationality:     Ireland
ship:     John Wesley
estimated birth year:     1823

Citing this Record

"United States, Index to Passenger Arrivals, Atlantic and Gulf Ports, 1820-1874," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KDR8-2XC : accessed 10 Feb 2013), Margaret Sullivan, 1849.

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name:     Margt Sullivan
event:     Immigration
event date:     1853
event place:     United States
gender:     Female
age:     30
country of origin or nationality:     Ire
ship:     Lori Woodbury
estimated birth year:     1823

Citing this Record

"United States, Index to Passenger Arrivals, Atlantic and Gulf Ports, 1820-1874," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KDR8-2N4 : accessed 10 Feb 2013), Margt Sullivan, 1853.

Comments

I am  most grateful for these leads.  Emma Clementa Peter was my maternal grandmother, born about 1856-1860 in New Orleans, LA and came to Washington, D.C.  Her mother's name was Sullivan from Ireland.  In the U.S. Census of 1880 there is a Margaret Sullivan, 60 years old living with my grandparents.  My mother often spoke of an Irish relative who influenced her and at 90 years was still young, more or less.  So I put these things together in trying to find some clue