I did Delta Tau Delta for you, DeltAlum.
I have no idea how naming chapters was done for Delt

but this is what I found:
12 ? active out of 37
45 ?? but Delt's another one that has several very old double-letter chapters (i.e. Beta Lambda @ Lehigh 1874 is active).
Edited according to the 1890 edition of Baird's.
Theta – Bethany College 1859
1860 active
Gamma – West Liberty College 1859
1861-1862
Gamma – Washington and Jefferson College 1861
active
Delta - Morgantown Academy 1861-1862
Beta – Ohio University 1862
active
Epsilon - Franklin College 1863-1863
Alpha – Allegheny College 1863
active
Kappa – Poughkeepsie Collegiate Institute 1865
- 1867
Zeta - Monmouth College 1865-1871
Lambda – Monmouth College 1865
um, no
Mu – Waynesburgh College 1865
- 1866
Mu – Ohio Wesleyan University 1866
active
Kappa – Hillsdale College 1867
Iota – Jamestown Collegiate Institute 1868
- 1871
Chi – Westminster College 1868
1869-1870
Lambda – Lombard College 1869
- 1885
Delta – University of Michigan 1871
nope, 1875
Rho – Lake Shore Seminary 1871
- 1875
Sigma - Franklin College 1871-1882
Zeta - University of Missouri 1872-1872
Upsilon - Illinois University 1872-1878
Phi – Hanover College 1872
Tau – Pennsylvania State 1872
- 1874 active
Chi – Franklin College 1872
uh, no, it was Sigma...see above
Iota – Michigan State 1872
Psi - Wabash College 1872-1879
Eta – Buchtel College 1873
Xi – Simpson College 1873
Psi - Kentucky University 1873-1878
Rho – Stevens Institute of Technology 1874
active
Tau – Franklin and Marshall 1874
Nu – Lafayette College 1874
Chi – Iowa Wesleyan 1874
1875-1880
Sigma – Mt. Union College 1875
- 1884
Omega - Iowa Agricultural College 1875
Epsilon – Albion College 1876
active
Psi – Wooster College 1879
Upsilon – Rensselaer Polytechnic Institute 1879
active
Omicron – University of Iowa 1880
Chi – Kenyon College 1881
active
Sigma - Columbia College 1882-1888
Zeta – Case Western Reserve University 1882
active
Sigma – Williams College 1891
Phi – Washington and Lee University 1896
Omega – University of Pennsylvania 1897
active
Chapters that were originally Rainbow
Pi – University of Mississippi 1848 (1886)
Lambda – Vanderbilt University 1881 (1886)
For God's sake, will some Delt please fix this mess I made of your history!