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Lady Aberlin

First MRN Appearance
Last MRN Appearance
Performed By

Lady Betty Kay Aberlin is the niece (originally the great-niece) of King Friday XIII and his brother Paul. Their sister, Claire, is her mother. She is the granddaughter of King Thursday and cousin of Prince Tuesday, Nicky, Quentin, Polly, and Kevin. Lady Aberlin considers singer Mabel Mercer to be her "pretend aunt"[1] and celebrates her birthday on December 30th.[2][3]

For a short time, Lady Aberlin was an assistant to Harriett Elizabeth Cow at the school at Someplace Else. She has also served as the head of the Neighborhood of Make-Believe's Water Department[4] and as the Neighborhood’s Director of Research (including wind and laughing research). While working on laughing research, Lady Aberlin turns into a tiger.[5]

Lady Aberlin is gererally a very positive personality in the Neighborhood of Make-Believe and often shows this through song and dance or other forms of art such as drawing.[6] She has a close relationship with each neighbor, particularly with Daniel Striped Tiger. Lady Aberlin and Daniel often talk about their feelings and occasionally share an ugga-mugga -- a sign of affection demonstrated by rubbing their noses together.

Operas and Plays

Lady Aberlin appeared in several of the Neighborhood operas and plays including the following parts:

Lady Aberlin's Name and Background

Lady Aberlin's full name is mentioned a few times throughout the run of Mister Rogers' Neighborhood including Episode 1698.



  • A caricature of Lady Aberlin is seen in Episode 1068 as part of a book called Who's Coming to Mister Rogers' Neighborhood.
  • In early episodes of Mister Rogers' Neighborhood, the line between the real neighborhood and the Neighborhood of Make-Believe was not as definite. Lady Aberlin often crossed back and forth between reality and make-believe. Episode 1066 is one of the first episodes where Mister Rogers refers to the character in the real neighborhood as "Betty." So from that point forward, for the sake of documentation on this site, "Lady Aberlin" refers to the character in Make-Believe and "Betty Aberlin" refers to the character in the real neighborhood.
  • In Episode 1695, an inexplicable mark is seen on the inside of Lady Aberln's left arm.


C:\Users\Paul\Pictures\Mr Rogers\lady aberlin 0002.jpg
C:\Users\Paul\Pictures\Mr Rogers\lady aberlin 1101.jpg
C:\Users\Paul\Pictures\Mr Rogers\lady aberlin 1309.jpg
C:\Users\Paul\Pictures\Mr Rogers\josephine 1610.jpg
With her Uncle Friday
[Episode 0002]
Lady Aberlin
[Episode 1101]
With her Aunt Sara
[Episode 1309]
In Josephine the Short-necked Giraffe [Episode 1610]
C:\Users\Paul\Pictures\Mr Rogers\lady aberlin 1555.jpg
C:\Users\Paul\Pictures\Mr Rogers\lady aberlin wind research 1652.jpg
C:\Users\Paul\Pictures\Mr Rogers\lady aberlin tiger 1628.jpg
C:\Users\Paul\Pictures\Mr Rogers\kitty 1565.jpg
Visiting Daniel
[Episode 1555]
Conducting wind research
[Episode 1652]
Lady Aberlin Tiger
[Episode 1628]
Kitty in A Star for Kitty
[Episode 1565]
C:\Users\Paul\Pictures\Mr Rogers\lady aberlin 1695.jpg
C:\Users\Paul\Pictures\Mr Rogers\lady aberlin 1759.jpg
C:\Users\Paul\Pictures\Mr Rogers\trolley lady aberlin 1668.jpg
C:\Users\Paul\Pictures\Mr Rogers\Betty Mefford 1535.jpg
Lady Aberlin
[Episode 1695]
At the castle
[Episode 1759]
As a young girl, seen through the Trolley [Episode 1668]
Betty Mefford in A Granddad For Daniel [Episode 1535]
C:\Users\Paul\Pictures\Mr Rogers\zookeeper 1169.jpg
C:\Users\Paul\Pictures\Mr Rogers\betty green 1505.jpg
Operator Aberlin in Pineapples and Tomatoes [Episode 1125]
The zookeeper in A Monkey's Uncle [Episode 1169]
Betty in The Snow People
[Episode 1245]
Betty Green in Spoon Mountain
[Episode 1505]
C:\Users\Paul\Pictures\Mr Rogers\pracilla cow 1300.jpg
C:\Users\Paul\Pictures\Mr Rogers\Miss morgan 1370.jpg
C:\Users\Paul\Pictures\Mr Rogers\betty 1425.jpg
C:\Users\Paul\Pictures\Mr Rogers\betty sweater maker 1475.jpg
Pricilla Cow in Potato Bugs and Cows [Episode 1300]
Miss Morgan in All in the Laundry [Episode 1370]
Betty in A Key to Otherland
[Episode 1425]
Betty Sweatermaker in Bubbleland [Episode 1475]


Mister Rogers' Neighborhood

CDs, Records, and Tapes

Home Video

Other Video


  1. Episode 1041. Mister Rogers' Neighborhood
  2. Episode 1563. Mister Rogers' Neighborhood
  3. Episode 1291. Mister Rogers' Neighborhood
  4. Episode 1529. Mister Rogers' Neighborhood
  5. Episode 1628. Mister Rogers' Neighborhood
  6. Episode 1041. Mister Rogers' Neighborhood

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