Williams, John H.
From Santa Cruz County history wiki
John H. Williams (1830-1892) was a Pennsylvania-born architect who arrived in Santa Cruz about 1868. He first had his office in designer-builder John Morrow’s home on Pacific Avenue, and resided on Branciforte Avenue.
- The Sidewalk Companion to Santa Cruz Architecture (4th ed. 2023), "John Williams", Appendix A, page 282 (source of bio info above).