08/14/2026
Why does Chico have a street named So-Wil-Len-No Avenue and what does the name mean?
So-Wil-Len-No Avenue runs alongside Chico Creek from The Esplanade to Arcadian Avenue, bordering Bidwell Mansion State Historic Park. At Arcadian it turns into a campus road, and ends at Tehama Hall. Once upon a time it went further, at least as far as Warner Street. No structure has an address on So-Wil-Len-No. It is sometimes spelled without the hyphens, as Sowillenno Avenue.
The avenue was named by Annie Bidwell for her dear friend, Maggie Lafonso. Maggie’s Indian name, according to Annie’s notebook, was So-will-len-no, as seen in the image. Maggie’s name is the last in the list. The notebook is now in the Bancroft Library.
Maggie Lafonso was the daughter of Amanda and Holai Lafonso, the Mechoopda rancheria chief. Annie seems to have known that Amanda was the daughter of John Bidwell. If so, Maggie was John Bidwell’s grand-daughter, although there is no firm evidence. Maggie was certainly someone to whom Annie gave particular attention and care.
Maggie is frequently mentioned in Annie Bidwell’s diary. She had a lovely singing voice and often sang in the Mechoopda church. She worked together with Annie in establishing the church, and took part in teaching and leading worship services. Annie relied on her as a liaison with the Indians on the rancheria and as a co-worker in Christian good works.
On December 21, 1907, Maggie, aged 25, married Joseph Mitchell, an Indian from Colusa. Sadly, Maggie passed away after childbirth in 1909 and her baby too died. Annie, who had visited her frequently in her illness, was overwhelmed with sorrow at the death of her “beloved Maggie,” and memorialized her in the name of the avenue that runs alongside Bidwell Mansion.