diff --git a/lineage_notes.txt b/lineage_notes.txt
index 74472976..9df5f3cd 100644
--- a/lineage_notes.txt
+++ b/lineage_notes.txt
@@ -1164,6 +1164,7 @@ KP.2.16	Alias of B.1.1.529.2.86.1.1.11.1.2.16, ORF8:F6S
 KP.3	Alias of B.1.1.529.2.86.1.1.11.1.3, S:Q493E, from sars-cov-2-variants/lineage-proposals#1410
 KP.3.1	Alias of B.1.1.529.2.86.1.1.11.1.3.1, G15372T, A19722G
 KP.3.1.1	Alias of B.1.1.529.2.86.1.1.11.1.3.1.1, ORF1a:S4286C, C12616T, S:S31del, Spain
+MC.1	Alias of B.1.1.529.2.86.1.1.11.1.3.1.1.1, S:T572I
 KP.3.1.2	Alias of B.1.1.529.2.86.1.1.11.1.3.1.2, S:S151I，from sars-cov-2-variants/lineage-proposals#1589
 KP.3.1.3	Alias of B.1.1.529.2.86.1.1.11.1.3.1.3, S:S31F,from sars-cov-2-variants/lineage-proposals#1576
 KP.3.1.4	Alias of B.1.1.529.2.86.1.1.11.1.3.1.4, ORF1b:P1675S,from #2627
diff --git a/lineages.csv b/lineages.csv
index 873aed95..b1149dcf 100644
--- a/lineages.csv
+++ b/lineages.csv
@@ -2560012,3 +2560012,14 @@ Taiwan/CDC-W38190/2024,KP.3.3.1
 Taiwan/CDC-W38189/2024,KP.3.3.1
 USA/CA-GBW-GKPLAAAA15277/2024,KP.3.3.1
 USA/CA-GBW-GKISBBBB36299/2024,KP.3.3.1
+Spain/PV-HUD-76101297/2024,MC.1
+Ireland/D-SVUH-FAZ30949-050/2024,MC.1
+Spain/CL-47292/2024,MC.1
+Spain/CL-47313/2024,MC.1
+Spain/AR-HCULB-00020851/2024,MC.1
+Spain/EX-BA_18640157/2024,MC.1
+Spain/CL-47341/2024,MC.1
+Spain/MC-HCUVA-70021621/2024,MC.1
+Spain/PV-HUB-56161440/2024,MC.1
+USA/VA-GBW-GKPLAAAA21282/2024,MC.1
+USA/VA-GBW-GKISBBBE02013/2024,MC.1
diff --git a/pango_designation/alias_key.json b/pango_designation/alias_key.json
index 9faf737f..211a8712 100644
--- a/pango_designation/alias_key.json
+++ b/pango_designation/alias_key.json
@@ -271,6 +271,7 @@
     "LZ": "B.1.1.529.2.86.1.1.18.2",
     "MA": "B.1.1.529.2.86.1.1.18.3",
     "MB": "B.1.1.529.2.86.1.1.49.1",
+    "MC": "B.1.1.529.2.86.1.1.11.1.3.1.1",
     "XA": ["B.1.1.7","B.1.177"],
     "XB": ["B.1.634","B.1.631"],
     "XC": ["AY.29","B.1.1.7"],