diff --git a/lineage_notes.txt b/lineage_notes.txt
index 7e01f45f..2308df3a 100644
--- a/lineage_notes.txt
+++ b/lineage_notes.txt
@@ -2653,6 +2653,7 @@ XBT	Recombinant lineage of BA.5.2.34, BA.2.75, BA.5.2.34, Germany, from issue #1
 XBU	Recombinant lineage of BA.2.75.3, BQ.1, BA.2.75.3, from issue #1425
 XBV	Recombinant lineage of CR.1, XBB.1, from issue #1460
 XBW	Recombinant lineage of XBB.1.5, BQ.1.14, from issue #1505
+XBY	Recombinant lineage of BR.2.1, XBF, from issue #1669
 *A.2.1	Withdrawn: Lineage with sequences predominantly from Panama
 *A.8	Withdrawn: Indian lineage merged with A.9
 *A.10	Withdrawn: Spanish lineage reassigned to A.5
diff --git a/lineages.csv b/lineages.csv
index 9164099d..34b6cb66 100644
--- a/lineages.csv
+++ b/lineages.csv
@@ -2236921,4 +2236921,21 @@ USA/NY-CDC-LC0977803/2022,XBW
 USA/NY-PRL-221223_00C05/2022,XBW
 Germany/SH-RKI-I-1114222/2023,XBW
 Germany/SH-RKI-I-1114180/2023,XBW
+Australia/VIC80754/2023,XBY
+Australia/VIC80760/2023,XBY
+Australia/NSW-ICPMR-42721/2023,XBY
+Australia/NSW-NSWHP-42037/2023,XBY
+Australia/NSW-ICPMR-42371/2023,XBY
+Australia/SA521854/2023,XBY
+Australia/SA521889/2023,XBY
+Australia/NSW-ICPMR-42229/2023,XBY
+Australia/QLD0x012DEE/2023,XBY
+Australia/VIC81692/2023,XBY
+Australia/NSW-ICPMR-42254/2023,XBY
+Australia/NSW-NSWHP-41953/2023,XBY
+Australia/NSW-NSWHP-41794/2023,XBY
+Australia/ACT10736/2023,XBY
+Australia/NSW-ICPMR-42204/2023,XBY
+Australia/NSW-ICPMR-43326/2023,XBY
+Australia/NSW-ICPMR-42791/2023,XBY
 
diff --git a/pango_designation/alias_key.json b/pango_designation/alias_key.json
index 1a4b204f..76ea362f 100644
--- a/pango_designation/alias_key.json
+++ b/pango_designation/alias_key.json
@@ -192,5 +192,6 @@
     "XBT": ["BA.5.2.34","BA.2.75","BA.5.2.34"],
     "XBU": ["BA.2.75.3","BQ.1","BA.2.75.3"],
     "XBV": ["CR.1","XBB.1"],
-    "XBW": ["XBB.1.5","BQ.1.14"]
+    "XBW": ["XBB.1.5","BQ.1.14"],
+    "XBY": ["BR.2.1","XBF"]
 }