diff --git a/lineage_notes.txt b/lineage_notes.txt
index c46c867a..700b3f6f 100644
--- a/lineage_notes.txt
+++ b/lineage_notes.txt
@@ -2927,6 +2927,7 @@ EG.5.1.4	Alias of XBB.1.9.2.5.1.4, ORF1b:K2557R from https://github.com/cov-line
 EG.5.1.5	Alias of XBB.1.9.2.5.1.5, ORF1a:L3293I, ORF1b:T1274I, ORF1b:L2349V, Portugal
 EG.5.1.6	Alias of XBB.1.9.2.5.1.6, S:F157L, ORF1a:S1857L, USA from https://github.com/sars-cov-2-variants/lineage-proposals/issues/394
 EG.5.2	Alias of XBB.1.9.2.5.2, N:L161F
+EG.5.2.1	Alias of XBB.1.9.2.5.2.1, S:S704L, USA
 EG.6	Alias of XBB.1.9.2.6, C1684T, Israel
 EG.6.1	Alias of XBB.1.9.2.6.1, S:456L (T22928C), Israel/Japan/Canada From #1950
 EG.7	Alias of XBB.1.9.2.7, S:R403K, S:L513F, ORF1a:N2531S, Germany/England
diff --git a/lineages.csv b/lineages.csv
index 0e1592f1..8ebdaaac 100644
--- a/lineages.csv
+++ b/lineages.csv
@@ -2450880,3 +2450880,37 @@ England/PHEC-YYEIQKM/2023,DV.7.2
 England/PHEC-YYEWU5F/2023,DV.7.2
 England/PHEC-YYEWUZP/2023,DV.7.2
 England/PHEC-YYEI3UP/2023,DV.7.2
+USA/TX-HMH-129158/2023,EG.5.2.1
+USA/TX-HMH-129146/2023,EG.5.2.1
+USA/NY-CDC-QDX80414796/2023,EG.5.2.1
+USA/FL-CDC-QDX80338532/2023,EG.5.2.1
+USA/DE-CDC-LC1043523/2023,EG.5.2.1
+USA/MI-UM-L365664757/2023,EG.5.2.1
+USA/VA-CAV_VAS3N_00018672_01/2023,EG.5.2.1
+USA/VA-CAV_VAS3N_00018668_01/2023,EG.5.2.1
+USA/VA-CAV_VAS3N_00018683_01/2023,EG.5.2.1
+USA/FL-CDC-LC1042347/2023,EG.5.2.1
+USA/CA-CDPH-500115572/2023,EG.5.2.1
+USA/AZ-CDC-LC1042814/2023,EG.5.2.1
+USA/AZ-CDC-LC1042813/2023,EG.5.2.1
+USA/FL-CDC-QDX81608154/2023,EG.5.2.1
+USA/FL-CDC-QDX81608155/2023,EG.5.2.1
+USA/FL-CDC-QDX81608153/2023,EG.5.2.1
+USA/FL-CDC-QDX81728608/2023,EG.5.2.1
+USA/FL-CDC-QDX81456344/2023,EG.5.2.1
+USA/FL-CDC-QDX82103332/2023,EG.5.2.1
+USA/FL-CDC-QDX82198867/2023,EG.5.2.1
+USA/PA-CDC-LC1044116/2023,EG.5.2.1
+USA/TX-CDC-QDX81826914/2023,EG.5.2.1
+USA/SC-CDC-LC1045966/2023,EG.5.2.1
+USA/CA-HLX-STM-SKBCV2YEV/2023,EG.5.2.1
+USA/AK-ANMC-0172/2023,EG.5.2.1
+PuertoRico/PR-CVL-018296/2023,EG.5.2.1
+USA/PA-CDC-VSX-A349247/2023,EG.5.2.1
+Singapore/R49MR91/2023,EG.5.2.1
+Canada/QC-L00629456001/2023,EG.5.2.1
+USA/MA-CDC-QDX82000000/2023,EG.5.2.1
+USA/NC-ECU-119058285/2023,EG.5.2.1
+USA/NC-CDC-LC1044275/2023,EG.5.2.1
+USA/NC-CDC-VSX-A349104/2023,EG.5.2.1
+USA/NY-CDC-QDX81685227/2023,EG.5.2.1