diff --git a/src/ui/ICSCard.ts b/src/ui/ICSCard.ts
index 5e79a3cc3..10528ca32 100644
--- a/src/ui/ICSCard.ts
+++ b/src/ui/ICSCard.ts
@@ -46,6 +46,30 @@ function renderRelatedNoteIndicator(
 	});
 }
 
+function getEventSourceName(icsEvent: ICSEvent, plugin: TaskNotesPlugin): string {
+	const subscription = plugin.icsSubscriptionService
+		?.getSubscriptions()
+		.find((candidate) => candidate.id === icsEvent.subscriptionId);
+	if (subscription?.name) {
+		return subscription.name;
+	}
+
+	const provider = plugin.calendarProviderRegistry?.findProviderForEvent(icsEvent);
+	if (provider) {
+		const { calendarId } = provider.extractEventIds(icsEvent);
+		const calendar = provider
+			.getAvailableCalendars()
+			.find(
+				(candidate) =>
+					candidate.id === calendarId ||
+					(calendarId === "primary" && candidate.primary === true)
+			);
+		return calendar?.summary || provider.providerName;
+	}
+
+	return plugin.i18n.translate("ui.icsCard.calendarFallback");
+}
+
 function formatTimeRange(icsEvent: ICSEvent, plugin: TaskNotesPlugin): string {
 	try {
 		if (!icsEvent.start) return "";
@@ -85,12 +109,12 @@ export function createICSEventCard(
 		card.dataset.relatedNoteCount = String(opts.relatedNoteCount);
 	}
 
-	// Determine subscription color and name
+	// Determine subscription color and source name
 	const subscription = plugin.icsSubscriptionService
 		?.getSubscriptions()
 		.find((s) => s.id === icsEvent.subscriptionId);
 	const color = icsEvent.color || subscription?.color || "var(--color-accent)";
-	const sourceName = subscription?.name || plugin.i18n.translate("ui.icsCard.calendarFallback");
+	const sourceName = getEventSourceName(icsEvent, plugin);
 
 	// Main row
 	const mainRow = card.createEl("div", { cls: "task-card__main-row" });
@@ -228,7 +252,7 @@ export function updateICSEventCard(
 		?.getSubscriptions()
 		.find((s) => s.id === icsEvent.subscriptionId);
 	const color = icsEvent.color || subscription?.color || "var(--color-accent)";
-	const sourceName = subscription?.name || plugin.i18n.translate("ui.icsCard.calendarFallback");
+	const sourceName = getEventSourceName(icsEvent, plugin);
 
 	// Update icon color on wrapper to propagate to svg (icons use currentColor)
 	element.style.setProperty("--current-status-color", color);
diff --git a/tests/unit/issues/issue-provider-calendar-source-name.test.ts b/tests/unit/issues/issue-provider-calendar-source-name.test.ts
new file mode 100644
index 000000000..383c14a09
--- /dev/null
+++ b/tests/unit/issues/issue-provider-calendar-source-name.test.ts
@@ -0,0 +1,90 @@
+import { describe, expect, it, jest } from "@jest/globals";
+import { createICSEventCard, updateICSEventCard } from "../../../src/ui/ICSCard";
+import type { ICSEvent } from "../../../src/types";
+
+function createEvent(overrides: Partial<ICSEvent> = {}): ICSEvent {
+	return {
+		id: "google-primary-event-1",
+		subscriptionId: "google-primary",
+		title: "Team sync",
+		start: "2026-08-03T10:00:00",
+		end: "2026-08-03T11:00:00",
+		allDay: false,
+		...overrides,
+	};
+}
+
+function createPlugin() {
+	const provider = {
+		providerName: "Google Calendar",
+		extractEventIds: (event: ICSEvent) => ({
+			calendarId: event.subscriptionId.replace("google-", ""),
+			eventId: event.id,
+		}),
+		getAvailableCalendars: jest.fn(() => [
+			{
+				id: "person@example.com",
+				summary: "Personal",
+				primary: true,
+			},
+		]),
+	};
+
+	return {
+		app: {},
+		i18n: {
+			translate: (key: string) => (key === "ui.icsCard.calendarFallback" ? "Calendar" : key),
+		},
+		settings: {
+			calendarViewSettings: {
+				timeFormat: "24",
+			},
+		},
+		icsSubscriptionService: {
+			getSubscriptions: () => [],
+		},
+		calendarProviderRegistry: {
+			findProviderForEvent: jest.fn(() => provider),
+		},
+	};
+}
+
+describe("provider calendar source names on ICS cards", () => {
+	it("shows a provider calendar name for primary-alias Google events", () => {
+		const card = createICSEventCard(createEvent(), createPlugin() as any);
+
+		expect(card.querySelector(".task-card__metadata")?.textContent).toContain("Personal");
+		expect(card.querySelector(".task-card__metadata")?.textContent).not.toContain("Calendar");
+	});
+
+	it("refreshes the provider calendar name when an existing card updates", () => {
+		const plugin = createPlugin();
+		const card = createICSEventCard(createEvent(), plugin as any);
+		plugin.calendarProviderRegistry.findProviderForEvent.mockReturnValue({
+			providerName: "Microsoft Calendar",
+			extractEventIds: () => ({ calendarId: "work", eventId: "event-1" }),
+			getAvailableCalendars: () => [{ id: "work", summary: "Work" }],
+		});
+
+		updateICSEventCard(
+			card,
+			createEvent({ id: "microsoft-work-event-1", subscriptionId: "microsoft-work" }),
+			plugin as any
+		);
+
+		expect(card.querySelector(".task-card__metadata")?.textContent).toContain("Work");
+		expect(card.querySelector(".task-card__metadata")?.textContent).not.toContain("Personal");
+	});
+
+	it("uses the translated fallback when no subscription or provider owns the event", () => {
+		const plugin = createPlugin();
+		plugin.calendarProviderRegistry.findProviderForEvent.mockReturnValue(undefined);
+
+		const card = createICSEventCard(
+			createEvent({ id: "unknown-event", subscriptionId: "unknown" }),
+			plugin as any
+		);
+
+		expect(card.querySelector(".task-card__metadata")?.textContent).toContain("Calendar");
+	});
+});