Both this group, the P-T77-1st-a and most of the descendants of Beta-1-B T-P77 (ISOGG T1a1a1a FTDNA T1a2) DYS590=9 (including reported Sephardi 217732) are probably all descendants of Jewish group who spent time in Iberia.
You can find additional information in this Ashkenazi branch of ftdna by Jeffrey D. Wexler in 2019 .
This branch is in the T-group of Jewish Branches.
This branch is a member of the Ashkenazi branches
group | Name | Ancestor | Country | SNP | D Y S 3 9 3 | D Y S 3 9 0 | D Y S 1 9 | D Y S 3 9 1 | D Y S 3 8 5 | D Y S 4 2 6 | D Y S 3 8 8 | D Y S 4 3 9 | D Y S 3 8 9 i | D Y S 3 9 2 | D Y S 3 8 9 i i | D Y S 4 5 8 | D Y S 4 5 9 | D Y S 4 5 5 | D Y S 4 5 4 | D Y S 4 4 7 | D Y S 4 3 7 | D Y S 4 4 8 | D Y S 4 4 9 | D Y S 4 6 4 | D Y S 4 6 0 | Y - G A T A - H 4 | Y C A I I | D Y S 4 5 6 | D Y S 6 0 7 | D Y S 5 7 6 | D Y S 5 7 0 | C D Y | D Y S 4 4 2 | D Y S 4 3 8 | D Y S 5 3 1 | D Y S 5 7 8 | D Y F 3 9 5 S 1 | D Y S 5 9 0 | D Y S 5 3 7 | D Y S 6 4 1 | D Y S 4 7 2 | D Y F 4 0 6 S 1 | D Y S 5 1 1 | D Y S 4 2 5 | D Y S 4 1 3 | D Y S 5 5 7 | D Y S 5 9 4 | D Y S 4 3 6 | D Y S 4 9 0 | D Y S 5 3 4 | D Y S 4 5 0 | D Y S 4 4 4 | D Y S 4 8 1 | D Y S 5 2 0 | D Y S 4 4 6 | D Y S 6 1 7 | D Y S 5 6 8 | D Y S 4 8 7 | D Y S 5 7 2 | D Y S 6 4 0 | D Y S 4 9 2 | D Y S 5 6 5 | D Y S 7 1 0 | D Y S 4 8 5 | D Y S 6 3 2 | D Y S 4 9 5 | D Y S 5 4 0 | D Y S 7 1 4 | D Y S 7 1 6 | D Y S 7 1 7 | D Y S 5 0 5 | D Y S 5 5 6 | D Y S 5 4 9 | D Y S 5 8 9 | D Y S 5 2 2 | D Y S 4 9 4 | D Y S 5 3 3 | D Y S 6 3 6 | D Y S 5 7 5 | D Y S 6 3 8 | D Y S 4 6 2 | D Y S 4 5 2 | D Y S 4 4 5 | Y - G A T A - A 1 0 | D Y S 4 6 3 | D Y S 4 4 1 | Y - G G A A T - 1 B 0 7 | D Y S 5 2 5 | D Y S 7 1 2 | D Y S 5 9 3 | D Y S 6 5 0 | D Y S 5 3 2 | D Y S 7 1 5 | D Y S 5 0 4 | D Y S 5 1 3 | D Y S 5 6 1 | D Y S 5 5 2 | D Y S 7 2 6 | D Y S 6 3 5 | D Y S 5 8 7 | D Y S 6 4 3 | D Y S 4 9 7 | D Y S 5 1 0 | D Y S 4 3 4 | D Y S 4 6 1 | D Y S 4 3 5 |
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AB-020 | T-P77-Y31474-Z41760 | 13 | 23 | 14 | 10 | 14-16 | 11 | 12 | 11 | 14 | 13 | 31 | 16 | 9-9 | 11 | 13 | 28 | 14 | 19 | 33 | 11-13-16-16 | 10 | 10 | 23-25 | 16 | 13 | 16 | 18 | 35-36 | 12 | 9 | 11 | 8 | 17-17 | 8 | 11 | 10 | 8 | 12 | 10 | 12 | 20-20 | 16 | 10 | 12 | 12 | 15 | 8 | 12 | 22 | 19 | 16 | 11 | 12 | 13 | 10 | 11 | 12 | 11 | 31 | 15 | 8 | 15 | 12 | 25 | 28 | 19 | 11 | 12 | 14 | 13 | 12 | 9 | 12 | 11 | 11 | 11 | 12 | 30 | 11 | 13 | 21 | 16 | 10 | 11 | 19 | 15 | 17 | 14 | 24 | 16 | 11 | 15 | 26 | 12 | 23 | 19 | 10 | 12 | 17 | 9 | 11 | 11 | ||||
AB-020b | T-P77-Y31474-Z41760b | 13 | 23 | 14 | 10 | 14-16 | 11 | 12 | 11 | 14 | 13 | 30 | 17 | 9-9 | 11 | 13 | 27 | 14 | 19 | 33 | 11-13-16-17 | 10 | 10 | 23-24 | 16 | 14 | 16 | 17 | 35-38 | 12 | 9 | 11 | 8 | 17-17 | 8 | 11 | 10 | 8 | 11 | 10 | 12 | 20-20 | 16 | 10 | 12 | 12 | 15 | 8 | 12 | 22 | 20 | 16 | 11 | 11 | 13 | 10 | 11 | 12 | 11 | 31 | 15 | 8 | 15 | 12 | 25 | 28 | 19 | 11 | 12 | 14 | 13 | 12 | 9 | 12 | 11 | 10 | 11 | 12 | 30 | 11 | 13 | 21 | 16 | 10 | 11 | 19 | 15 | 16 | 14 | 24 | 16 | 11 | 15 | 26 | 12 | 22 | 18 | 10 | 12 | 17 | 9 | 11 | 11 |
List of SNPs in yfull tree:Home - A0-T - A1 - A1b - BT - CT - CF - F - GHIJK - HIJK - IJK - K - LT - T - L206 - M70 - L162 - L208 - CTS11451 - Y4119 - CTS2214 - Z709 - CTS7703 - Z710 - L906 - Y4984 - P77 - Y4964 - Y4956 - CTS6507 - FGC80981 - Y31474 - Y31473 - Y91965
The following kitnr's are recognized in this group:
85389
NJDJT
85555
J3662
125618
DM9ZQ
109926
Kits with nearby 67-markers are found in semargl.me
Check for yourself by inspecting the data that was used.