diff --git a/plugins/tiddlywiki/katex/styles.tid b/plugins/tiddlywiki/katex/styles.tid
index afb328887..165d91a6b 100644
--- a/plugins/tiddlywiki/katex/styles.tid
+++ b/plugins/tiddlywiki/katex/styles.tid
@@ -19,6 +19,26 @@ tags: [[$:/tags/Stylesheet]]
 	counter-reset: katexEqnNo;
 }
 
+/* Replace \eqref placeholder with generated eqnum */
+
+.katex-eqref [data-katex-eqnum] > * {
+	display: none;
+}
+
+.katex-eqref [data-katex-eqnum]::after {
+	content: attr(data-katex-eqnum);
+}
+
+/* Emulate tiddlylink style but w/o decorating the parentheses */
+
+.katex-eqref a {
+	text-decoration: none;
+}
+
+.katex-eqref a:hover .enclosing {
+	text-decoration: underline;
+}
+
 /* Avoid TW5's max-width: 100% */
 
 .katex svg {
diff --git a/plugins/tiddlywiki/katex/wrapper.js b/plugins/tiddlywiki/katex/wrapper.js
index 05b820749..3c3c56c5b 100644
--- a/plugins/tiddlywiki/katex/wrapper.js
+++ b/plugins/tiddlywiki/katex/wrapper.js
@@ -13,7 +13,11 @@ var katex = require("$:/plugins/tiddlywiki/katex/katex.min.js"),
     chemParse = require("$:/plugins/tiddlywiki/katex/mhchem.min.js"),
 	Widget = require("$:/core/modules/widgets/widget.js").widget;
 
-katex.macros = {};
+katex.macros = {
+	'\\label': '\\htmlClass{katex-label}{\\htmlId{###1}{}}',
+	'\\eqref': '\\htmlClass{katex-eqref}{\\href{#####1}{(\\htmlData{katex-label=#1}{\\text{#1}})}}',
+};
+
 katex.updateMacros = function() {
 	var tiddlers = $tw.wiki.getTiddlersWithTag("$:/tags/KaTeX/Macro"),
 		regex = /#\d/g, // Remove the arguments like #1#2
@@ -54,6 +58,9 @@ KaTeXWidget.prototype.render = function(parent,nextSibling) {
 	// Render it into a span
 	var span = this.document.createElement("span"),
 		options = {throwOnError: false, displayMode: displayMode, macros: katex.macros};
+	options.trust = function (ctx) {
+		return ctx.command == '\\href' || ctx.command == '\\htmlClass' || ctx.command == '\\htmlData' || ctx.command == '\\htmlId' && ctx.id[0] == '#';
+	};
 	try {
 		if(!this.document.isTiddlyWikiFakeDom) {
 			katex.render(text,span,options);
@@ -64,9 +71,34 @@ KaTeXWidget.prototype.render = function(parent,nextSibling) {
 		span.className = "tc-error";
 		span.textContent = ex;
 	}
+	// rewrite identifiers to make them unique
+	var tiddlerFrame = parent.closest('.tc-tiddler-frame');
+	var safeTitle = tiddlerFrame.dataset.tiddlerTitle.replaceAll(/\s+/g, '');
+	$tw.utils.each(span.querySelectorAll('.katex-label [id^="#"]'), function (element) {
+		var safeId = element.id.replaceAll(/\s+/g, '~');
+		element.setAttribute('id', '#' + safeTitle + safeId);
+		element.classList.add('katex-label' + safeId);
+	});
+	$tw.utils.each(span.querySelectorAll('.katex-eqref [href^="##"]'), function (element) {
+		element.href = '##' + safeTitle + element.getAttribute('href').substring(1).replaceAll(/\s+/g, '~');
+	});
 	// Insert it into the DOM
 	parent.insertBefore(span,nextSibling);
 	this.domNodes.push(span);
+	// compute data-katex-eqnum attributes on elements made by \eqref
+	$tw.utils.each(tiddlerFrame.querySelectorAll('.katex-eqref [data-katex-label]:not([data-katex-eqnum])'), function (element) {
+		// find a unique matching element made by \label (or quit)
+		var katexLabels = tiddlerFrame.getElementsByClassName('katex-label#' + element.dataset.katexLabel.replaceAll(/\s+/g, '~'));
+		if (katexLabels.length != 1) return;
+		// everything is a <span> and the span holding a row doesn't even have a class
+		var katexRow = katexLabels[0].closest('.vlist > *');
+		var katexPos = Array.prototype.indexOf.call(katexRow.parentElement.children, katexRow);		// which row has the label
+		var katexEqn = katexRow.closest('.katex-html').querySelectorAll('.tag .eqn-num')[katexPos];	// which eqn num corresponds
+		if (!tiddlerFrame._katex_eqn_num_elements) {
+			tiddlerFrame._katex_eqn_num_elements = tiddlerFrame.getElementsByClassName('eqn-num');
+		}
+		element.dataset.katexEqnum = 1 + Array.prototype.indexOf.call(tiddlerFrame._katex_eqn_num_elements, katexEqn);
+	});
 };
 
 /*
@@ -85,7 +117,7 @@ KaTeXWidget.prototype.refresh = function(changedTiddlers) {
 		this.refreshSelf();
 		return true;
 	} else {
-		return false;	
+		return false;
 	}
 };