Thomas (I) Szécsényi (Hungarian: Szécsényi (I.) Tamás; died 1354) was a Hungarian powerful baron and soldier, who rose to prominence during King Charles I's war against the oligarchs. He belonged to the so-called "new aristocracy", who supported the king's efforts to restore royal power in the first decades of the 14th century. He was the first member of the influential Szécsényi family.
Thomas Szécsényi - Wikipedia

http://hu.wikipedia.org/wiki/Sz%C3%A9cs%C3%A9nyi_Tam%C3%A1s

Szécsényi Tamás

http://genealogy.euweb.cz/hung/kacsics.html

Kacsics, Zagyvafői, Libercsei, Farkas de Harinna, Geréb de Vingárt families

N from Kacsics family had issue:

• A1. a son
  • B1. Simon, Bán, fl 1213-28 **B2. Mihály, Bán of Slavonia, fl 1212-28
    • ...
  • B2. Mihály, Bán of Slavonia, fl 1212-28
    • C1. Leusták Zagyvafői; his issue bore the surname Zagyvafői
      • ...
    • C2. Falkos, fl 1255
      • D1. Farkas, Pohárnokmester (magister pincernarum), fl 1271-1301
        • E1. János, fl 1299
        • E2. Tamás Szécsényi, Főispán (obergespan) of Arad, Bács and Szerém (1318-1321), Tárnokmester (magister tavernicorum) (1320-1321), Vajda of Erdély (Transylvania) and Főispán of Szolnok (1321-1342), Főispán of Szeben (1324), Főispán of Arad (1330-1342), Főispán of Csongrád (1330), Főispán of Nógrád (1334-1343), Főispán of Trencsén (1338-1342), Tárnokmester and Főispán of Abaúj, Heves, Borsod, Gömör, Szepes (1342-1342), Főispán of Keve and Krassó (1346-1350), Országbíró (iudex curiae regiae) (1349-1354), Főispán of Turóc (1350-1354), *ca 1285, +1354; 1m: N, dau.of Pál Visontai; 2m: Pss Anna of Auschwitz (+after 19.9.1354); for his issue, Szécsényi family, see HERE
        • E3. Mihály, fl 1299
        • E4. Miklós, fl 1299
        • E5. Péter, fl 1299-1333
          • F1. István, fl 1333-65
          • F2. Tamás, fl 1333-55
          • F3. Farkas (Domokos) Szeszármai
            • G1. Miklós, fl 1379
            • G2. János, fl 1379
            • G3. Tamás Farkas de Harinna et Szeszárma; his issue bore the surname Farkas de Harinna, for which see HERE
        • E6. István, fl 1299
        • E7. Leusták, fl 1299
        • E8. Balázs, fl 1299

http://genealogy.euweb.cz/hung/szecsenyi.html

Szécsényi family

Tamás Szécsényi, Főispán (obergespan) of Arad, ... 1m: N, dau of pál Visontai; 2m: Pss Anna of Auschwitz (+after 19.9.1354); He had issue:

• A1. [1m.] Kónya (Miklós), Bán of Croatia, +1367; m.Elisabeth, dau.of Wulfing von Haschendorf
  • ...
• A2. [1m.] Mihály, Bp of Eger, +1377
• A3. [1m.] István, fl 1331
• A4. [2m.] Gáspár, fl 1339-40
• A5. [2m.] Anna, +before 1354
• A6. [2m.] László, fl 1339-40