diff --git a/calendar/inc/class.calendar_hooks.inc.php b/calendar/inc/class.calendar_hooks.inc.php
index a6afcd3929b..14226ac574c 100644
--- a/calendar/inc/class.calendar_hooks.inc.php
+++ b/calendar/inc/class.calendar_hooks.inc.php
@@ -431,6 +431,13 @@ static function settings($hook_data)
 				'xmlrpc' => True,
 				'admin'  => False,
 			),
+			'participant_names'        => array(
+				'type'    => 'check',
+				'label'   => 'Show participant names on event',
+				'name'    => 'participant_names',
+				'help'    => 'Controls whether names of participants are shown alongside the title of an appointment.',
+				'default' => false
+			),
 			'2.5.section' => array(
 				'type'  => 'section',
 				'title' => lang('Configuration settings'),
diff --git a/calendar/inc/class.calendar_ui.inc.php b/calendar/inc/class.calendar_ui.inc.php
index 50576ea5fd4..afc75d65954 100644
--- a/calendar/inc/class.calendar_ui.inc.php
+++ b/calendar/inc/class.calendar_ui.inc.php
@@ -782,6 +782,9 @@ public function to_client(&$event)
 		$participants = $this->bo->participants($event,false);
 		$event['parts'] = implode("\n",$participants);
 		$event['participant_types'] = array();
+		// semicolon-separated string of participants that may (optionally) be shown alongside title
+		$participantNames = "";
+
 		foreach($participants as $uid => $text)
 		{
 			$user_type = $user_id = null;
@@ -797,7 +800,14 @@ public function to_client(&$event)
 					'account_id'
 				));
 			}
+			$participantNames .= ($this->bo->participant_name($user_id) . "; ");
+		}
+		// add the names of all participants as semicolon-separated string
+		if($GLOBALS['egw_info']['user']['preferences']['calendar']['participant_names'])
+		{
+			$event['participant_names'] = substr($participantNames, 0, -2);
 		}
+
 		$event['date'] = $this->bo->date2string($event['start']);
 
 		// Change dates
diff --git a/calendar/js/et2_widget_event.js b/calendar/js/et2_widget_event.js
index e3ec1182616..e095f9b3afe 100644
--- a/calendar/js/et2_widget_event.js
+++ b/calendar/js/et2_widget_event.js
@@ -326,8 +326,8 @@ var et2_calendar_event = (function(){ "use strict"; return et2_valueWidget.exten
 		var title = !event.is_private ? egw.htmlspecialchars(event['title']) : egw.lang('private');
 
 		this.title
-			.html('<span class="calendar_calTimespan">'+this._get_timespan(event) + '<br /></span>')
-			.append('<span class="calendar_calEventTitle">'+title+'</span>')
+			.html('<span class="calendar_calTimespan">' + this._get_timespan(event) + '<br /></span>')
+			.append('<span class="calendar_calEventTitle">' + this._getTitle(event) + '</span>')
 
 		// Colors - don't make them transparent if there is no color
 		if(jQuery.Color("rgba(0,0,0,0)").toRgbaString() != jQuery.Color(this.div,'background-color').toRgbaString())
@@ -342,7 +342,7 @@ var et2_calendar_event = (function(){ "use strict"; return et2_valueWidget.exten
 		// Body
 		if(event.whole_day_on_top)
 		{
-			this.body.html(title);
+			this.body.html(this._getTitle(event));
 		}
 		else
 		{
@@ -358,8 +358,8 @@ var et2_calendar_event = (function(){ "use strict"; return et2_valueWidget.exten
 			).trim();
 
 			this.body
-				.html('<span class="calendar_calEventTitle">'+title+'</span>')
-				.append('<span class="calendar_calTimespan">'+start_time + '</span>');
+				.html('<span class="calendar_calEventTitle">' + this._getTitle(event) + '</span>')
+				.append('<span class="calendar_calTimespan">' + start_time + '</span>');
 			if(this.options.value.description.trim())
 			{
 				this.body
@@ -713,6 +713,54 @@ var et2_calendar_event = (function(){ "use strict"; return et2_valueWidget.exten
 		return timespan;
 	},
 
+	/**
+	 * Creates the title-string for an event
+	 * @param {Object} event the current event.
+	 * @return {string} the resulting title.
+	 */
+	_getTitle: function(event) {
+		let title = "";
+		if(!event.is_private)
+		{
+			title = egw.htmlspecialchars(event['title']);
+			title += this._getParticipants(event);
+		}
+		else
+		{
+			title = egw.lang('private');
+		}
+		return title;
+	},
+
+	/**
+	 * Retrieves participant names from an event
+	 * @param {Object} event the current event
+	 * @return {string} the participants as span-objects
+	 */
+	_getParticipants: function(event) {
+		let participants = "";
+		if(this._hasParticipantNames(event))
+		{
+			return '<span style="font-weight: normal"> // ' + event["participant_names"] + "</span>"
+		}
+		return participants;
+	},
+
+	/**
+	 * Tries to detect provided names of participants for an event.
+	 * Names will only be shown when provided with the event.
+	 *
+	 * @param {Object} event the current event
+	 * @return boolean whether the event contains participant-names or not
+	 */
+	_hasParticipantNames: function(event)
+	{
+		return event["participant_names"] !== undefined
+			&& event["participant_names"] !== null;
+	},
+
+
+
 	/**
 	 * Make sure event data has all proper values, and format them as expected
 	 * @param {Object} event
diff --git a/calendar/lang/egw_de.lang b/calendar/lang/egw_de.lang
index 61e71b56825..edad80b4c65 100644
--- a/calendar/lang/egw_de.lang
+++ b/calendar/lang/egw_de.lang
@@ -109,6 +109,7 @@ close the window	calendar	de	Schließt das Fenster
 compose a mail to all participants after the event is saved	calendar	de	Schreibe eine E-Mail an alle Teilnehmer, nachdem der Termin gespeichert wurde.
 configuration settings	calendar	de	Einstellungen der Konfiguration
 conflict	calendar	de	Konflikt
+controls whether names of participants are shown alongside the title of an appointment.	calendar	de	Steuert, ob die Namen von Teilnehmern auf einem Termin (neben dem Titel) angezeigt werden.
 copy of:	calendar	de	Kopie von:
 copy this event	calendar	de	Kopiert diesen Termin
 copy your changes to the clipboard, %1reload the entry%2 and merge them.	calendar	de	Kopieren Sie ihre Änderungen in die Zwischenablage, %1laden den Eintrag neu%2 und fügen diese wieder ein.
@@ -531,6 +532,7 @@ show only invitations, not yet accepted or rejected	calendar	de	Zeige nur Einlad
 show only rejected events	calendar	de	Zeige nur abgesagte Termine
 show only tentative accepted events	calendar	de	Zeige nur vorläufig zugesagte Termine
 show only the date, not the year	admin	de	Zeige nur das Datum nicht das Jahr
+show participant names on event	calendar	de	Zeige Teilnehmer auf einem Termin an
 show this month	calendar	de	Diesen Monat anzeigen
 show this week	calendar	de	Diese Woche anzeigen
 show year and age	calendar	de	Zeige Jahr und Alter
diff --git a/calendar/lang/egw_en.lang b/calendar/lang/egw_en.lang
index 34dd720aeab..18297081636 100644
--- a/calendar/lang/egw_en.lang
+++ b/calendar/lang/egw_en.lang
@@ -109,6 +109,7 @@ close the window	calendar	en	Close the window
 compose a mail to all participants after the event is saved	calendar	en	Compose a mail to all participants after the event is saved.
 configuration settings	calendar	en	Configuration settings
 conflict	calendar	en	Conflict
+controls whether names of participants are shown alongside the title of an appointment.	calendar	en	Controls whether names of participants are shown alongside the title of an appointment.
 copy of:	calendar	en	Copy of:
 copy this event	calendar	en	Copy this event
 copy your changes to the clipboard, %1reload the entry%2 and merge them.	calendar	en	Copy your changes to the clipboard, %1reload the entry%2 and merge them.
@@ -531,6 +532,7 @@ show only invitations, not yet accepted or rejected	calendar	en	Show only invita
 show only rejected events	calendar	en	Show only rejected events
 show only tentative accepted events	calendar	en	Show only tentative accepted events
 show only the date, not the year	admin	en	Show only the date, not the year
+show participant names on event	calendar	en	Show participant names on event
 show this month	calendar	en	Show this month
 show this week	calendar	en	Show this week
 show year and age	calendar	en	Show year and age