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John R. Vacca: technical author, editor, reviewer, researcher — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Genealogy And Ancestry →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
linkinvestigations.co.uk ↗	65 match 1 shared topics	Private Investigators, Tracing Agents, Researchers	GB en	genealogy-and-ancestry WordPress WooCommerce	robotsllmsaihumans	emailphone	none
drnicholasdixon.com ↗	64 match 1 shared topics	Dr Nicholas Dixon – Genealogist and Historical Researcher	en	genealogy-and-ancestry WordPress	robotsllmsaihumans	emailphone	none
carusogenealogy.com ↗	64 match 1 shared topics	Discover Your Ancestral Heritage \| Rocco Caruso Heritage Research	en	genealogy-and-ancestry	robotsllmsaihumans	emailphone	none
carpathianresearch.com ↗	64 match 1 shared topics	Carpathian Genealogy Research	en	genealogy-and-ancestry	robotsllmsaihumans	emailphone	none
digiroots.net ↗	64 match 1 shared topics	DigiRoots.net : Genealogy and Technology, explored.	en	genealogy-and-ancestry WordPress	robotsllmsaihumans	emailphone	none
hatfieldroots.com ↗	64 match 1 shared topics	ALFRED HATFIELD RESEARCH	en	genealogy-and-ancestry Weebly	robotsllmsaihumans	emailphone	none
joanreidgenealogy.com ↗	64 match 1 shared topics	Joan Reid Genealogy \| Researcher and family historian	en	genealogy-and-ancestry WordPress	robotsllmsaihumans	emailphone	none
carolyounggenealogy.com ↗	64 match 1 shared topics	Carol Young Genealogy – Family History Researcher	en	genealogy-and-ancestry WordPress WooCommerce	robotsllmsaihumans	emailphone	none
debrettancestry.com ↗	64 match 1 shared topics	Home - Debrett Ancestry Research	en	genealogy-and-ancestry WordPress WooCommerce	robotsllmsaihumans	emailphone	none
familytreetracker.com ↗	64 match 1 shared topics	Family Tree Trackers \| Family History and Heritage Research	en	genealogy-and-ancestry Wix	robots llmsaihumans	emailphone	none
dwresearchservices.co.uk ↗	64 match 1 shared topics	House Historian \| Genealogist \| Plymouth \| Devon \| DW Research	GB en	genealogy-and-ancestry WordPress	robotsllmsaihumans	email phone	none
digitalgenealogist.co.uk ↗	64 match 1 shared topics	UK Genealogy Services and Family History Research \| The Digital Genealogist	GB en	genealogy-and-ancestry	robotsllmsaihumans	emailphone	none
drakehistory.com ↗	64 match 1 shared topics	Gordon Drake - Family Research	en	genealogy-and-ancestry	robotsllmsaihumans	emailphone	none
famylink.com ↗	64 match 1 shared topics	Genealogy research \| FamyLink \| Ramat Raziel	en	genealogy-and-ancestry Wix	robots llmsaihumans	emailphone	none
cubaresearchproject.com ↗	63 match 1 shared topics	Cuba Research Project - Cuban Genealogy & Demographics	en	genealogy-and-ancestry WordPress WooCommerce	robotsllmsaihumans	emailphone	none
familylinesgenealogy.com ↗	63 match 1 shared topics	Family Research \| Family Lines Genealogy	en	genealogy-and-ancestry Wix	robots llmsaihumans	emailphone	none
diggerdave.net ↗	63 match 1 shared topics	Dave Johnson Genealogy Research – genealogy research	en	genealogy-and-ancestry WordPress	robotsllmsaihumans	emailphone	none
downtheroad.dev ↗	63 match 1 shared topics	Down The Road - Your Complete Irish Genealogy Research Toolkit	en	genealogy-and-ancestry	robotsllmsaihumans	emailphone	full · 15

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.