subclade "provides some tentative evidence of ancient flow with eastern areas that could support the idea that the [late Celtic] La Tene culture was accompanied by some migration." Where it is found in those of predominately Irish descent, with Gaelic surnames, it may suggest an ancestor who arrived in Ireland during prehistory, from Celtic Britain. For example, I-M284 includes many males with the surnames McGuinness and McCartan, who have a single, historically-recorded male ancestor in the 6th century; thus it is unlikely to be the result of subsequent migration from Britain to Ireland. Some subclades of I-M284 that are atypical of Ireland are relatively common in continental Europe, which also supports a point of origin east of Ireland. I-CTS10057 Continentals. Mother Haplogroup for group I-Z161 (Continental 1 and 2) and I-L701 group (Continental 3). Around 10.000 years old. I-Z161 Haplogroup I2a1b1a2b (ISOGG 2019). Z161+ defines the I2 Continental clade 1 and 2. Its age is estimated around 7,000 years old. It is mainly found in North Europe, especially in Denmark, Germany, the Netherlands, and England. In Northwest Sicily it can also be found; this is believed to be due to remnants of a Norman settlement. I-L701 Called Continental 3. Continental 3 has a wide distribution. Found in Central Europe from Germany, Austria to Poland, Romania and Ukraine, but also in lower frequencies in Greece, Italy, France, Spain, England, Ireland, and Armenia. It may have been disseminated in part by the Goths. It is nearly absent from Scandinavia and Scotland. I-M436 Subclades list Up-to-date phylogenetic trees listing subclades of I can be found at Y-Full and FamilyTreeDNA •I2 M438/P215/PF3853/S31 (16638804 A->G) • •I2a L460/PF3647/S238 (7879415 A->C) • • •I2a1 P37.2/PF4004 (14491684 T->C) • • • •I2a1a CTS595 (6874115 C->T) • • • • •I2a1a1 M26/PF4056 (21865821 G->A) • • • • • •I2a1a1a CTS8968/PF4036 (18584762 T->C) • • • • • • •I2a1a1a1 L672/S327 (22228628 T->A) • • • • • • • •I2a1a1a1a L160/PF4013/S184 • • • • • • •I2a1a1a2 CTS6027 (16620529 C->G) w. Europeans • • • • • • •I2a1a1a3 Z27395 (16681589 A->G) • • • • • • • •I2a1a1a3a Z27410 (18891640 T->G) • • • • • • • • •I2a1a1a3a1 Z27430 (15383072 T->C) • • • • • • • • • •I2a1a1a3a1a Z27446 (14420039 G->A) • • • • • • • • • • •I2a1a1a3a1a1 Z27447 (17445510 A->G) • • • •