diff --git a/ontology/mop.md b/ontology/mop.md
index 76a0448d3..7866d684a 100644
--- a/ontology/mop.md
+++ b/ontology/mop.md
@@ -3,6 +3,7 @@ id: mop
 contact: 
   email: batchelorc@rsc.org
   label: Colin Batchelor
+title: Molecular Process Ontology
 description: Processes at the molecular level
 homepage: https://github.com/rsc-ontologies/rxno
 build:
diff --git a/ontology/rxno.md b/ontology/rxno.md
index fac2fcf4d..c072e5236 100644
--- a/ontology/rxno.md
+++ b/ontology/rxno.md
@@ -4,6 +4,7 @@ id: rxno
 contact: 
   email: batchelorc@rsc.org
   label: Colin Batchelor
+title: Name Reaction Ontology
 description: Connects organic name reactions to their roles in an organic synthesis and to processes in MOP
 homepage: https://github.com/rsc-ontologies/rxno
 build:
diff --git a/ontology/vhog.md b/ontology/vhog.md
index e37a32285..ced9b9073 100644
--- a/ontology/vhog.md
+++ b/ontology/vhog.md
@@ -1,6 +1,7 @@
 ---
 layout: ontology_detail
 id: vhog
+title: Vertebrate Homologous Ontology Group Ontology
 products:
   - id: vhog.owl
 is_obsolete: true
diff --git a/ontology/vto.md b/ontology/vto.md
index 846c57b94..57e9cf0f4 100644
--- a/ontology/vto.md
+++ b/ontology/vto.md
@@ -3,6 +3,7 @@ layout: ontology_detail
 id: vto
 products:
   - id: vto.owl
+title: Vertebrate Taxonomy Ontology
 tracker: http://purl.obolibrary.org/obo/vto/tracker
 ---