The younger brother of Agnes Poett, Alfred was ten when the family arrived in San Francisco in 1849. Not long afterward Alfred was sent to London for training as a civil engineer. After working in London and the Azores, Alfred moved to San Francisco in the early 1860s, where he served as an engineer for the Central Pacific Railroad and for various Peninsula estate holders, including Senator Leland Stanford and William C. Ralston. Alfred also laid out a number of the roads in modern-day Hillsborough, as well as St. John’s Cemetery, where his older sister, Agnes Poett Howard Howard Bowie, is interred.
Alfred married Mary Louise Williams, the daughter of Mr. and Mrs. H.B. Williams, of San Francisco’s Williams, Dimond and Company. By the early 1890s, the couple had moved to Santa Barbara. Alfred and Mary Poett had four children: Henry W., Marion, Alfred R., and Mabel. Henry Williams (“Harry”) Poett married Genevieve Carolan, the sister and sister-in-law of Francis and Harriet Pullman Carolan.
The H.W. Poetts remained in the Hillsborough area for several generations. Marion Poett married her first cousin, Joseph Henry Poett Howard (“J.H.P. Howard”), the second son of Agnes and George Howard. The J.H.P. Howard family also remained in the Hillsborough area. Alfred Redington Poett married Mercedes Dibblee, from Santa Barbara’s de la Guerra land grant family. Descendants of that family still own and operate Rancho San Julian, near Lompoc, CA. Mabel Poett married Carl Francis Edwards, also from Santa Barbara.