diff --git a/data/personen/brenda-langedijk.json b/data/personen/brenda-langedijk.json
index 07a4f5d..0a2c9ee 100644
--- a/data/personen/brenda-langedijk.json
+++ b/data/personen/brenda-langedijk.json
@@ -1,4 +1,5 @@
 {
+  "id": "brenda-langedijk",
   "name": "Brenda Langedijk",
   "email": "",
   "gender": "female",
@@ -6,10 +7,10 @@
   "thumbnail": "/afbeeldingen/personen/brenda-langedijk-200x200.jpg",
   "social": {
     "github": "",
-    "twitter": "",
     "instagram": "",
     "linkedin": "",
     "mastodon": "",
-    "mastodon_url": ""
+    "mastodon_url": "",
+    "twitter": ""
   }
 }
diff --git a/data/personen/fred-donck.json b/data/personen/fred-donck.json
index c80be64..1a86c69 100644
--- a/data/personen/fred-donck.json
+++ b/data/personen/fred-donck.json
@@ -1,4 +1,5 @@
 {
+  "id": "fred-donck",
   "name": "Fred Donck",
   "email": "",
   "gender": "male",
@@ -6,10 +7,10 @@
   "thumbnail": "/afbeeldingen/personen/fred-donck-200x200.jpg",
   "social": {
     "github": "",
-    "twitter": "",
     "instagram": "",
     "linkedin": "",
     "mastodon": "",
-    "mastodon_url": ""
+    "mastodon_url": "",
+    "twitter": ""
   }
 }
diff --git a/data/personen/hans-van-de-looy.json b/data/personen/hans-van-de-looy.json
index 89252e7..1b3ba38 100644
--- a/data/personen/hans-van-de-looy.json
+++ b/data/personen/hans-van-de-looy.json
@@ -1,4 +1,5 @@
 {
+  "id": "hans-van-de-looy",
   "name": "Hans Van de Looy",
   "email": "",
   "gender": "male",
@@ -11,10 +12,10 @@
   }],
   "social": {
     "github": "",
-    "twitter": "",
     "instagram": "",
     "linkedin": "",
     "mastodon": "",
-    "mastodon_url": ""
+    "mastodon_url": "",
+    "twitter": ""
   }
 }
diff --git a/data/personen/koen-de-jonge.json b/data/personen/koen-de-jonge.json
index 3f2d0c4..6e4c44d 100644
--- a/data/personen/koen-de-jonge.json
+++ b/data/personen/koen-de-jonge.json
@@ -1,15 +1,16 @@
 {
+  "id": "koen-de-jonge",
   "name": "Koen de Jonge",
   "email": "",
   "gender": "male",
   "nationality": "Dutch",
   "thumbnail": "/afbeeldingen/personen/koen-de-jonge-200x200.jpg",
   "social": {
-    "github": "",
-    "twitter": "",
+    "github": "synq",
     "instagram": "",
     "linkedin": "",
-    "mastodon": "",
-    "mastodon_url": ""
+    "mastodon": "@koen@procolix.social",
+    "mastodon_url": "https://procolix.social/@koen",
+    "twitter": "koendejonge"
   }
 }
diff --git a/data/personen/patrick-reijnen.json b/data/personen/patrick-reijnen.json
index ab1506f..04f6bb5 100644
--- a/data/personen/patrick-reijnen.json
+++ b/data/personen/patrick-reijnen.json
@@ -1,4 +1,5 @@
 {
+  "id": "patrick-reijnen",
   "name": "Patrick Reijnen",
   "email": "patrick@nluug.nl",
   "gender": "male",
diff --git a/data/personen/ronny-lam.json b/data/personen/ronny-lam.json
index bd2db15..d140534 100644
--- a/data/personen/ronny-lam.json
+++ b/data/personen/ronny-lam.json
@@ -6,11 +6,11 @@
   "nationality": "Dutch",
   "thumbnail": "/afbeeldingen/personen/ronny-lam-200x200.jpg",
   "social": {
-    "github": "",
+    "github": "RonnyLam",
     "instagram": "",
-    "linkedin": "",
-    "mastodon": "",
-    "mastodon_url": "",
+    "linkedin": "ronnylam",
+    "mastodon": "@ronnylam@mastodon.social",
+    "mastodon_url": "https://mastodon.social/@ronnylam",
     "twitter": ""
   }
 }
diff --git a/data/personen/rudi-van-drunen.json b/data/personen/rudi-van-drunen.json
index 684c704..66e3c18 100644
--- a/data/personen/rudi-van-drunen.json
+++ b/data/personen/rudi-van-drunen.json
@@ -1,4 +1,5 @@
 {
+  "id": "rudi-van-drunen",
   "name": "Rudi van Drunen",
   "email": "",
   "gender": "male",
@@ -10,11 +11,11 @@
     "url": "https://www.rudi.photography/"
   }],
   "social": {
-    "github": "",
     "twitter": "dvidur",
     "instagram": "rudivandrunen",
     "linkedin": "",
     "mastodon": "",
-    "mastodon_url": ""
+    "mastodon_url": "",
+    "twitter": "dvidur",
   }
 }