Table:
0
A
B
C
D
E
1
District
Vacator
Reason for change
Successor
Date successor seated
2
Virginia 5th
John Randolph ( J )
Died May 24, 1833
Thomas T. Bouldin ( J )
Seated December 2, 1833
3
South Carolina 3rd
Thomas D. Singleton ( N )
Died November 25, 1833
Robert B. Campbell ( N )
Seated February 27, 1834
4
South Carolina 5th
George McDuffie ( N )
Resigned some time in 1834.
Francis W. Pickens ( N )
Seated December 8, 1834
5
Virginia 5th
Thomas T. Bouldin ( J )
Died February 11, 1834
James W. Bouldin ( J )
Seated March 28, 1834
6
Ohio 1st
Robert T. Lytle ( J )
Resigned March 10, 1834
Robert T. Lytle ( J )
Re-seated December 27, 1834
7
South Carolina 8th
James Blair ( J )
Died April 1, 1834
Richard I. Manning ( J )
Seated December 8, 1834
8
Maryland 1st
Littleton P. Dennis ( J )
Died April 14, 1834
John N. Steele ( J )
Seated June 9, 1834
9
Virginia 11th
Andrew Stevenson ( J )
Resigned June 2, 1834
John Robertson ( AJ )
Seated December 8, 1834
10
Massachusetts 2nd
Rufus Choate ( AJ )
Resigned June 30, 1834
Stephen C. Phillips ( AJ )
Seated December 1, 1834
11
Connecticut At-large
William W. Ellsworth ( AJ )
Resigned July 8, 1834
Joseph Trumbull ( AJ )
Seated December 1, 1834
12
Vermont 5th
Benjamin F. Deming ( AM )
Died July 11, 1834
Henry F. Janes ( AM )
Seated December 2, 1834
13
Illinois 1st
Charles Slade ( J )
Died July 26, 1834
John Reynolds ( J )
Seated December 1, 1834

Questions and formulas:
Question: What is every date successor seated for the Virginia 11th District?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="Virginia 11th"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,A2:A13="Virginia 11th"),5))
Level: medium